Topics in the Economic Analysis of Law
Course Book for GRA6296
Introduction and Orientation
A Note on This Book
This course book covers the material taught in the lectures and can be used together with the Cooter & Ulen chapters and the lecture slides to prepare for the exam.
What This Book Covers
The book covers foundations (economic reasoning, transaction costs, information, self-enforcement) and contracts (why contracts exist, limits of private ordering, contract design). The treatment of contracts aligns closely with the lectures and what is tested on the exam. Students can safely skip the Cooter & Ulen chapters on contracts and rely on this book instead.
What This Book Does Not Cover
The book does not currently cover criminal law, tort law, or the legal process. For these topics, you should rely on Cooter & Ulen and the lecture slides.
The plan is that next year these topics will also be covered by the course book, at which point Cooter & Ulen will become optional background reading and this book will become the mandatory reading for the course. This will not affect you, but I mention it for context: the book is part of a larger project to provide complete course materials over time.
Work in Progress
I will continuously improve this book throughout the semester. If you have comments on structure, content, or clarity, they are very welcome.
You can access the book online or download the HTML file for offline use.
About the Course and the Exam
This course teaches you how to think about legal rules using economic reasoning. The goal is not to memorize doctrine or reproduce textbook arguments, but to learn how to analyze legal and business problems in a structured, transparent, and convincing way.
At the exam, you will be asked to analyze realistic cases involving contracts, regulation, litigation, or compliance. There is rarely a single correct answer. What matters is whether your reasoning is clear, well structured, and grounded in economic theory.
What We Are Testing
You are expected to demonstrate that you understand the course material by applying it. In particular, good answers:
- Use concrete examples, preferably tied directly to the case.
- Explicitly use economic theory (for example cost–benefit analysis, optimal deterrence, bargaining theory) and explain why it is relevant.
- State assumptions clearly, and explain how conclusions might change if those assumptions do not hold.
- Use your own words rather than quoting the book or lecture slides.
- When helpful, use simple numerical examples to clarify the logic.
Memorizing definitions or reproducing standard arguments is not sufficient.
Structure of the Exam
The exam is a three-hour written, open-material exam. The questions are case-based and closely resemble the practice exam assignments given during the semester. Most questions fall into one of three types:
- Legal rules, institutions, and interpretation — evaluating, justifying, or interpreting legal rules using cost–benefit reasoning.
- Ex ante incentive design — analyzing how contracts should be designed to maximize total surplus.
- Private behavior under legal incentives — predicting how rational actors behave given the legal environment.
How Answers Are Graded
Answers are graded based on demonstrated understanding, not on whether you reach a particular conclusion. Clear structure, explicit reasoning, and correct use of economic concepts are rewarded. Different answers can receive full credit if the underlying logic is sound.
How to Prepare
The best way to prepare is to actively work through exam-style questions and practice structuring clear analyses under time pressure. Use the assignments, past exams, and NotebookLM-generated questions as your main sources of practice material.
About the Book
Why law and economics is useful
Legal rules shape behavior, markets, and institutions long before any dispute reaches a court. They affect how firms invest, how contracts are written, how risks are managed, and how people respond to incentives in everyday economic activity. To understand law only as a set of commands or doctrines is therefore insufficient. What matters just as much is how people and organizations respond to legal rules in practice.
Law and economics provides a systematic way to analyze these responses. By focusing on incentives, constraints, and trade-offs, it helps clarify why legal rules sometimes work as intended and why they sometimes produce unintended consequences. The same basic reasoning can be applied across many areas of law, from contracts and torts to criminal law, civil procedure, and competition law.
The goal of this book is not to promote a particular legal ideology, but to provide a disciplined way of thinking about how law affects behavior and outcomes.
Who this book is written for
This book is written primarily for students at a business school who will work in firms, consulting, finance, or regulated industries, and who will regularly interact with legal rules as part of professional decision-making. Many readers will need to understand not only what the law requires, but how legal rules shape incentives, risks, and strategic choices.
At the same time, the book is also intended for students who may work in public administration, regulatory agencies, courts, or policy-oriented roles, as well as for those who want to participate thoughtfully in public debate about law and regulation. Across these roles, the common need is an ability to reason about how legal rules influence real-world behavior.
What this book helps you do
The book aims to help you predict how individuals and firms are likely to respond to legal rules, to understand why some legal arrangements perform better than others, and to identify trade-offs involved in legal and regulatory design. It provides tools for analyzing both existing legal rules and proposed reforms, using economic reasoning to structure arguments and clarify consequences.
Rather than offering answers to specific legal questions, the book offers a framework for thinking systematically about law.
Business decisions and public decisions
Law and economics is useful from both a private and a public perspective. From a private perspective, it helps firms think about contract design, compliance, litigation strategy, and risk management. From a public perspective, it helps regulators, judges, and policymakers think about rule design, enforcement, and institutional structure.
This book deliberately moves between these perspectives. Understanding how private actors respond to legal rules is essential for good public policy, just as understanding public enforcement and regulation is essential for informed private decision-making.
How this book is designed
The book emphasizes incentives and behavior rather than legal doctrine. It uses simple models and stylized examples to isolate key mechanisms, not to reproduce the complexity of real legal systems in full detail. A small set of analytical tools is introduced and reused across chapters to highlight common patterns across different areas of law.
Simplification is a feature of this approach, not a flaw. Understanding the assumptions behind a model is often more important than the model's conclusions.
How to Read the Structural Sections of Each Chapter
Each application chapter in this book follows a fixed internal structure. Some sections are part of the analytical argument, while others play a structural and pedagogical role. Understanding this distinction will help you read more efficiently and prepare for the exam.
The following sections appear repeatedly across chapters and always have the same meaning.
Exam Question
This section presents a representative exam-style question for the chapter. It shows the type of problem the chapter prepares you to solve and clarifies what kind of reasoning is expected under exam conditions.
Worked Examples
This section contains fully worked, exam-style examples. Worked examples demonstrate how to structure reasoning: how to state assumptions, apply the relevant models, and justify conclusions step by step. They are templates for reasoning, not facts to memorize.
Assumptions and Robustness
This section explains how the chapter's main conclusions depend on key assumptions and how conclusions change when those assumptions are relaxed or modified. This is exam-relevant: you are expected to be able to discuss how results depend on assumptions and how alternative assumptions would affect behavior or efficiency.
Some material inside this section may be clearly marked as Awareness. Such material is included to broaden understanding but is not required for the exam.
Takeaways
This section summarizes what you should retain from the chapter. It states the core decision rules, mechanisms, and conclusions that you should be able to apply on the exam and in new contexts.
Numbered sections vs. structural sections
Numbered sections in each chapter form the analytical spine: they develop the economic argument step by step. The unnumbered structural sections described above provide scaffolding around that argument. They help you understand how to use the analysis, how to apply it on the exam, and how its conclusions depend on assumptions.
The Pedagogy of the Book: Active and Interactive Learning
This book is designed around a simple but strict pedagogical principle:
You learn law and economics by actively reasoning, not by passively reading.
Economic reasoning is a skill, not a body of facts. You do not learn to ride a bicycle by reading about it — you learn by practicing. The same applies here. If a concept does not click immediately from reading the chapter, that is normal. Understanding often comes from seeing the same idea applied across different examples and then trying to apply it yourself.
For that reason, the book is not organized as a linear text to be read from start to finish. Instead, its structure is deliberately designed to enforce engagement, signal priorities, and make passive consumption harder. The goal is not efficiency in reading, but discipline in reasoning.
Activation questions
In activation mode, the book occasionally prompts you to activate relevant knowledge before you proceed, or to check whether you have understood what you have just read. These prompts are meant to support learning by forcing you to retrieve and apply concepts rather than simply recognizing them on the page.
Activation questions are not assessments. They are tools for self-diagnosis. If you find them unhelpful or distracting, you can always turn activation mode off. However, using them as intended mirrors professional reasoning: good analysis starts by checking whether the necessary tools and concepts are actually in place.
Boxes
The book uses a small and fixed set of pedagogical boxes. These boxes are not summaries or decorative highlights. Each box type has a stable and precise meaning across the entire book.
Some boxes explain why a result holds (Intuition). Others show how to reason step by step in an exam-style format (Worked Examples). Assumptions boxes identify the conditions on which conclusions depend. Awareness material is explicitly marked as non-exam and is included only to broaden understanding. Each chapter ends with a single Takeaways box, which defines what you are expected to retain and be able to apply.
Learning to recognize these signals is part of learning how to read the book effectively.
Foldability
Many elements of the book are foldable in the HTML version, including sections and pedagogical boxes. This structure supports different reading strategies: a first pass focused on core logic, a second pass engaging with examples and extensions, and targeted review before the exam. By making these strategies explicit in the structure of the text, the book encourages active and purposeful reading rather than linear coverage.
How this book is created: AI as a collaborative tool
This book is created through a collaboration between human judgment and AI assistance.
The instructor defines the pedagogical goals, selects topics and analytical frameworks, determines assumptions, and decides what ultimately belongs in the book. AI is used as a support tool for drafting text, generating examples, maintaining consistency across chapters, and improving clarity.
All AI-assisted content is reviewed, edited, and approved by the instructor, who remains fully responsible for the final product.
Using NotebookLM
You are encouraged to set up your own NotebookLM for the course. NotebookLM is Google's AI tool that answers questions based on documents you upload. Unlike general-purpose AI assistants, it grounds its responses in your source materials and provides inline citations so you can verify its answers.
You are welcome to use other AI tools as well, but a NotebookLM configured with the course materials is the recommended starting point. Once set up, it can generate exam-style questions, give feedback on your answers, and produce example solutions in the style expected in this course.
This chapter explains how to set up your notebook and how to use it effectively to develop your economic reasoning abilities and prepare for the exam.
Setting Up Your Notebook
You will create your own notebook and upload the course materials.
Creating Your Notebook
- Go to https://notebooklm.google.com/
- Log in with your BI email (or your own Google account)
- Click "Create new notebook"
- Download the source files from the "NotebookLM Source Files" folder on its learning
- Add all the files to your notebook
The source files include:
- This course book in markdown format
- Course slides and readings (PDFs)
- Lecture transcripts (cleaned and annotated with slide references)
- Assignment questions and example solutions
- Past exams with solutions (2023–2025), which you can use as practice or ask the notebook to explain
- The foundations toolkit defining the course's analytical frameworks
- Guide files that tell the AI how to generate questions, feedback, and solutions
Configuring the Notebook
To make the notebook respond consistently to exam-related requests, you should configure its conversational goal:
- Click the settings icon in the top right corner
- Select "Configure notebook"
- Under "Define your conversational goal, style, or role", select "Custom"
- Paste the following instruction:
You support students in developing economic reasoning and preparing for the GRA6296 exam. When asked to generate an exam question or a complete exam, follow the structure and requirements in exam_format.md and do not include solutions. Provide solutions only if students explicitly request them. When reviewing student answers, give feedback in accordance with feedback_guide.md.
What the Notebook Can Do
The notebook supports exam preparation in three main ways:
- Generate practice questions — Ask for a single question on a specific topic or a complete exam. Questions follow the exam format: a realistic case followed by questions that require economic analysis.
- Give feedback on your answers — Paste your answer and ask for feedback. The notebook evaluates your reasoning along five criteria (responding to the question, choice of theory, economic reasoning, connection to case, assumptions), each rated Strong, Medium, or Weak.
- Generate example solutions — Ask for a model answer after you have attempted the question yourself. Remember that there are usually several correct approaches.
You can also use the notebook to clarify concepts ("Explain the difference between strict liability and negligence") or generate study materials (audio overviews, flashcards, quizzes). These features support understanding but do not replace reasoning practice.
How to Use the Notebook Effectively
The notebook is most valuable when you use it actively. The core principle is simple:
Always try to answer a question yourself before asking the notebook.
Even a partial or incorrect answer reveals what you understand and what you do not. If you go straight to the answer, you lose the learning opportunity. If you get stuck, ask for a hint rather than a full solution.
Active learning
The core active learning strategy in this course is simple:
Generate and answer exam-style questions.
This forces you to identify the relevant model, state assumptions, connect theory to the case, and justify a conclusion under uncertainty — exactly what the exam tests.
Use the notebook to support this process, not to replace it. Vary assumptions or parameters to see how conclusions change, and use feedback to diagnose weaknesses in your reasoning.
What to avoid
- Relying on summaries instead of reasoning through problems
- Copying formulations without understanding them
- Asking for solutions before genuinely trying
If you could not reproduce the argument on your own, you have not learned it. The notebook is a powerful tool, but it cannot do your learning for you.
Limitations
NotebookLM is grounded in your uploaded sources, which makes it more reliable than general-purpose AI tools. However, it can still make errors—especially on nuanced judgment calls or when combining ideas in new ways.
Always check the inline citations. When the notebook makes a claim, it shows which source it drew from. Click the citation to verify the information is accurate and not taken out of context.
The notebook cannot replace reading the material or thinking through problems yourself. It is a study partner, not an answer key. If you rely on it passively, you will not develop the reasoning skills the exam tests.
Foundations
What Is Law and Economics?
What Is Law and Economics?
Law and economics is an approach to legal analysis that uses economic theory to understand how legal rules affect behavior. At its core, economics studies how individuals and organizations respond to incentives. Law, in turn, is one of the most powerful systems for creating, shaping, and enforcing incentives in society. Law and economics brings these two perspectives together.
From an economic point of view, legal rules are not merely statements of rights and obligations. They are incentive mechanisms. Rules about liability, contract enforcement, criminal punishment, competition, or corporate governance all influence how people behave before anything goes wrong: how much they invest, how carefully they act, whether they comply with the law, and how they interact with others.
The central idea of law and economics is therefore simple:
- Legal rules influence behavior.
- Because behavior responds to incentives, legal rules can be analyzed using economic tools.
This approach is often referred to as law and economics (rettsøkonomi) or the economic analysis of law. While the terminology differs, the underlying method is the same: applying economic reasoning to legal institutions.
Law and economics pursues two closely related goals. The first is positive analysis (positiv analyse): understanding and predicting how people respond to legal rules. For example, how does a higher probability of detection affect criminal behavior? How do different liability rules affect precaution and risk-taking? How does contract enforcement influence investment decisions?
The second goal is normative analysis (normativ analyse): evaluating and designing legal rules. If legal rules shape incentives, then different rules will lead to different outcomes. Economic analysis helps us ask whether a legal rule encourages socially desirable behavior, discourages harmful behavior, or creates unintended distortions.
Importantly, law and economics does not treat the law as an abstract system detached from reality. Instead, it emphasizes how legal rules operate in practice. A rule that looks strict on paper may have little effect if it is rarely enforced. Conversely, a seemingly mild rule may strongly affect behavior if enforcement is credible and predictable.
Throughout this book, we will treat law as a system of incentives and constraints. By doing so, we can use a relatively small set of economic tools to analyze a wide range of legal fields — from contracts and torts to competition law, corporate law, criminal law, and the legal process itself.
A New Way to Think About Law
Law and economics offers a new way to think about law. Rather than starting from legal doctrines, categories, or formal rules, it starts from a simple question: how do legal rules affect behavior?
Traditional legal analysis often focuses on interpretation. What does a rule mean? How should it be applied to a particular set of facts? How does it fit within a broader doctrinal structure? These questions are essential for legal practice and adjudication. Law and economics does not replace them. Instead, it complements them by shifting attention to consequences.
The economic perspective asks how individuals and organizations respond to legal rules given their incentives and constraints. It treats legal rules as part of the environment in which people make decisions. From this perspective, the effect of a legal rule depends not only on its wording, but also on how it changes payoffs, risks, and strategic interaction.
This change in perspective has two important implications.
First, law and economics is largely forward-looking. Legal sanctions often apply after harm has occurred, but their main purpose is to influence behavior beforehand. Liability rules aim to induce precaution, contract remedies aim to support cooperation and investment, competition law aims to deter anti-competitive strategies, and criminal law aims to prevent crime. Understanding these forward-looking effects is central to economic analysis.
Second, law and economics emphasizes behavioral responses rather than formal compliance. A rule may be formally violated but rarely enforced, or strictly enforced but easily avoided through strategic behavior. Economic analysis therefore pays close attention to enforcement, detection, litigation costs, and institutional design.
A key distinction in law and economics is between positive and normative analysis. Positive analysis seeks to explain and predict behavior under existing legal rules. Normative analysis evaluates legal rules and asks how they should be designed. Throughout this book, we will move back and forth between these two perspectives.
Importantly, law and economics does not claim that efficiency is the only value relevant for law. Legal systems also care about fairness, rights, distribution, legitimacy, and moral considerations. Economic analysis does not deny the importance of these values. Rather, it provides a disciplined way to analyze trade-offs and to make the consequences of legal choices explicit.
Nor does law and economics assume that individuals are perfectly rational or purely self-interested in a narrow sense. The models we use are simplifications, designed to clarify mechanisms rather than to describe every detail of real-world behavior. Their value lies in helping us understand how incentives work, where they fail, and how institutions can be designed to perform better.
Seen in this light, law and economics is best understood as a framework for reasoning. It provides tools that can be applied across legal fields and institutional contexts. Once adopted, this way of thinking allows us to analyze very different areas of law using a common set of concepts — incentives, strategic interaction, information, and enforcement.
In the Norwegian legal tradition, reelle hensyn (policy considerations or substantive reasoning) is a recognized source of law. Economic arguments about incentives, efficiency, and behavioral effects fit naturally within this category. When courts or legislators consider whether a rule produces good outcomes, they are engaging in reasoning that law and economics makes explicit and systematic.
The Core Question of the Book: How Law Shapes Incentives
The central question of this book is how legal rules shape incentives and, through them, behavior. Across very different legal fields, the same underlying logic applies: individuals and organizations respond to the costs, benefits, risks, and opportunities created by the law.
Legal rules influence behavior long before courts, regulators, or enforcement authorities become involved. The prospect of enforcement, liability, or sanction affects decisions about effort, investment, pricing, compliance, and cooperation. From an economic perspective, the primary function of law is therefore not to punish past behavior, but to shape future behavior.
This incentive-based perspective allows us to analyze a wide range of legal fields using a common framework.
In contract law, legal rules determine whether parties are willing to invest in relationships that involve delayed exchange. If contracts are enforceable and remedies are predictable, parties are more willing to make relationship-specific investments. If enforcement is weak or uncertain, cooperation may fail or be replaced by alternative governance structures such as vertical integration or relational contracts.
In tort law, liability rules shape incentives for precaution. Rules about negligence and strict liability determine how much care injurers take and how much risk victims bear. The goal is not merely to compensate victims after accidents occur, but to reduce the expected social cost of accidents by influencing behavior beforehand.
In criminal law, sanctions affect the expected payoff from illegal behavior. The probability of detection and the severity of punishment jointly determine deterrence. Criminal law is often necessary when private enforcement through civil liability is insufficient, for example because detection probabilities are low.
In competition law, firms interact strategically in markets. Legal rules influence pricing, output, entry, and innovation by shaping the incentives for collusion, exclusion, and abuse of market power. Competition law can be understood as the regulation of strategic behavior in repeated games between firms.
In corporate law, legal rules govern the internal organization of firms and the relationships between managers, shareholders, creditors, and other stakeholders. Corporate governance mechanisms — such as fiduciary duties, boards, disclosure rules, and liability — are best understood as tools for addressing agency problems and aligning incentives within the firm.
Finally, the legal process itself shapes incentives. Procedural rules affect whether disputes are settled or litigated, how much parties invest in evidence and legal representation, and whether legal threats are credible. Litigation costs, delay, and uncertainty all influence behavior outside the courtroom.
Despite the diversity of these fields, the same economic logic applies throughout. Legal rules change payoffs, constrain choices, and structure strategic interaction. By focusing on incentives, we can analyze why legal rules take the form they do, how they affect behavior, and how they might be improved.
This book therefore adopts a deliberately unified approach. Rather than treating each area of law in isolation, we will repeatedly return to the same economic concepts — incentives, information, strategic interaction, and enforcement — and apply them across different legal contexts. The goal is not to master every doctrinal detail, but to develop a transferable way of reasoning about law.
The Basic Economic Tools Used in This Book
Although the legal fields covered in this book differ in substance and doctrine, the economic tools used to analyze them are remarkably similar. Rather than introducing new theory for each area of law, this book relies on a small and reusable set of analytical tools.
The most basic assumption underlying these tools is that individuals and organizations respond to incentives. This does not imply perfect rationality or complete information. Instead, it means that behavior tends to change in systematic ways when costs, benefits, risks, and constraints change.
A central tool throughout the book is strategic reasoning. In many legal contexts, outcomes depend not only on one actor's choices, but also on how those choices interact with the choices of others. Game theory provides a structured way to analyze such strategic interaction. We will use simple games and game trees to study behavior in contracts, litigation, competition, and crime.
Closely related is the idea of repeated interaction. When parties expect to interact again in the future, current behavior affects future payoffs. Repeated games help explain the role of reputation, relational contracts, collusion, and long-term cooperation.
Another key tool is bargaining theory. Many legal disputes are resolved through negotiation rather than adjudication. Bargaining models help us understand settlement behavior, contract renegotiation, and the division of surplus. We will rely on simple bargaining frameworks to analyze how legal rules affect bargaining positions and outcomes.
Information problems play a central role in law and economics. Legal disputes often arise because one party has information that another lacks. We will study asymmetric information, moral hazard, and adverse selection, and examine how legal rules, disclosure requirements, and liability regimes address these problems.
Finally, many legal issues involve principal–agent relationships. Managers act on behalf of shareholders, lawyers represent clients, and employees work for firms. Agency theory helps us understand how contracts, monitoring, liability, and governance structures are used to align incentives when interests diverge.
These tools are deliberately simple. Their purpose is not to capture every aspect of reality, but to isolate key mechanisms. By repeatedly applying the same tools across different legal fields, the book aims to build intuition and analytical discipline rather than technical sophistication.
An Economic Tour of Legal Fields
This book applies a common set of economic tools to a wide range of legal fields. Although these fields differ in doctrine and institutional setting, they can all be understood through the same lens: how legal rules shape incentives, information, and strategic interaction.
This section provides a brief tour of the main areas covered in the book. Its purpose is not to teach legal detail, but to show how the same economic reasoning reappears across different parts of the legal system.
In tort law, the central question is how legal rules influence behavior that creates risks of harm. Liability rules affect how much precaution individuals and firms take and how risks are allocated between injurers and victims. Economic analysis focuses on how different liability regimes change incentives before accidents occur, not only on compensation after harm has been done.
In contract law, the key problem is cooperation under delayed exchange. Parties often must make investments or perform actions before receiving the other party's performance. Contract law influences whether such cooperation is possible by shaping incentives to perform, to invest, and to renegotiate. Economic analysis highlights how enforcement, remedies, and contract design affect these incentives.
The legal process determines how disputes are resolved. Most disputes never reach trial, but are settled through bargaining in the shadow of the law. Procedural rules, litigation costs, delay, and uncertainty affect whether parties sue, settle, or comply voluntarily. From an economic perspective, procedure is itself a system of incentives that shapes behavior outside the courtroom.
In criminal law, the focus is on deterring harmful behavior when private enforcement is insufficient. Criminal sanctions affect behavior by changing the expected costs of illegal actions. Economic analysis emphasizes the interaction between detection probabilities, punishment severity, and enforcement resources, as well as the limits of relying solely on civil liability.
Competition law regulates strategic interaction between firms in markets. Firms may have incentives to collude, exclude rivals, or abuse market power. Economic analysis uses game theory and repeated interaction to study such behavior and to understand how legal rules influence pricing, entry, and innovation. Competition law can thus be seen as the regulation of strategic behavior among firms.
In corporate law, legal rules govern the internal organization of firms and the relationships between managers, shareholders, and creditors. Because decision-making authority is separated from ownership, corporate law must address agency problems. Economic analysis focuses on how governance mechanisms, liability rules, and disclosure requirements shape managerial incentives and control private benefits.
Across all these fields, the same questions recur. How do legal rules change payoffs? How do they affect strategic behavior? How do they interact with information and enforcement? By approaching different areas of law with the same economic tools, this book aims to provide a unified understanding of how law works in practice.
Cost–Benefit Analysis
Introduces:
- Cost–benefit analysis
- Economic surplus and efficiency
Used in:
- All application chapters
This chapter introduces cost–benefit analysis (CBA, nytte-kostnadsanalyse) as the central evaluative framework used throughout the book. CBA provides a disciplined way to assess whether a legal rule, contractual clause, or enforcement regime is likely to improve outcomes, by comparing the real benefits it creates to the real costs it imposes.
Economic Surplus and Efficiency
Cost–benefit analysis evaluates rules by their effect on economic surplus (samlet overskudd).
Economic surplus refers to the difference between the benefits created by an action, rule, or institutional arrangement and the real resources it consumes. When we say that a rule increases surplus, we mean that it creates more value than it destroys.
Throughout the book, a rule, clause, or institution is called efficient (effektiv) if it maximizes total economic surplus, taking behavioral responses and enforcement costs into account.
Cost–Benefit Analysis
Cost–benefit analysis (CBA) provides a structured way to evaluate legal rules, policies, and institutional arrangements by comparing their expected benefits to their expected costs across society as a whole. The relevant costs and benefits include all real effects generated by the rule, regardless of who bears them.
In practice, this requires analyzing how a rule changes behavior and identifying the resulting real-world effects, such as changes in precaution, investment, compliance, harm, delay, or resource use.
Cost–benefit reasoning is therefore distinct from the internal calculations made by private actors. Firms, individuals, and regulators routinely weigh expected gains against expected costs when deciding how to act. Such private cost–benefit reasoning is essential for predicting behavior, but it is not what we mean by cost–benefit analysis in this course.
In the legal context, CBA is used to assess whether a rule or policy is a good idea overall. It highlights that enforcement is not free: increasing deterrence typically requires higher monitoring costs, higher sanctions, or both. A rule performs well under CBA when the marginal benefits of improved behavior exceed the marginal social costs of enforcement and compliance.
Externalities and Internalization
An externality (eksternalitet) is a cost or benefit that a decision-maker imposes on others but does not take into account when choosing how to act. When such effects are not reflected in private payoffs, individual decisions may diverge from what is socially efficient.
When a legal rule changes private incentives so that decision-makers bear costs they would otherwise impose on others, economists say that the rule internalizes (internaliserer) the externality. Internalization aligns private decision-making with social costs, and doing so often tends to improve total economic surplus.
A Practical Recipe for Cost–Benefit Analysis
In law and economics, questions are rarely framed as formal cost–benefit calculations. Instead, they typically ask which factors matter for whether a rule, policy, or clause works well, or under what conditions it is likely to be beneficial.
Such questions invite a cost–benefit perspective. The goal is not to reach a definitive yes/no conclusion, but to identify what the answer depends on and to explain the relevant trade-offs in a structured way.
The following recipe shows how to do this.
Step 1: Be clear about what is being changed
State clearly what rule, clause, or policy is being considered, and what it is compared to (the status quo or an alternative rule). Cost–benefit reasoning is always comparative.
Step 2: Identify who changes behavior
Ask who is likely to act differently because of the rule: firms, consumers, managers, victims, offenders, litigants, regulators, etc.
Focus on how behavior changes (effort, care, delay, investment, compliance, litigation, quality, risk-taking).
Step 3: List real effects in the world
Identify the main positive and negative effects that follow from the change in behavior. These should be effects that exist in the real world and could, at least in principle, be measured.
Examples include time spent, resources used, harm avoided, risks reduced or increased, delays, accidents, errors, or misuse.
Avoid vague labels. If you mention something abstract (such as “trust” or “confidence”), explain what concrete effects it leads to.
Step 4: Handle transfers correctly
Some rules mainly shift money or risk from one party to another.
You may list such transfers, but you can also ignore them, since they cancel out when assessing whether the rule is a good idea overall. What matters is whether the rule changes behavior in a way that leads to real gains or real losses.
Step 5: Identify the key factors that determine magnitude
This is the most important step on the exam.
For each important effect, explain what determines whether it is large or small. For example:
- how strongly people respond to the rule,
- how much the rule changes prices, risks, or incentives,
- how costly enforcement or monitoring is,
- how easy it is to avoid or comply with the rule,
- how serious the underlying problem is to begin with.
You do not need numbers. You need to explain what would matter if numbers were available.
Step 6: Give conditional conclusions
Do not conclude that the rule is or is not a good idea.
Instead, explain:
- when the rule is more likely to work well,
- when it is more likely to work poorly,
- which considerations pull in opposite directions,
- and which assumptions about behavior, enforcement, information, or institutions these conclusions depend on.
Explain briefly how the conclusion would change if these assumptions do not hold.
Common Pitfalls When Using CBA
The recipe above describes how cost–benefit reasoning should be used in this course. In practice, exam answers often go wrong in predictable ways. Being aware of these pitfalls will help you avoid losing points for otherwise sensible ideas.
Calling private cost–benefit reasoning "CBA"
Students sometimes use the term "cost–benefit analysis" when analyzing a private actor's decision, such as whether a firm should invest in compliance, sue, settle, or take precautions. Analyzing how private actors weigh costs and benefits is often essential for predicting behavior, but this should not be called cost–benefit analysis. The term cost–benefit analysis (CBA) is used to evaluate whether a rule or policy is a good idea overall, by comparing the gains and losses it creates across society rather than for a single decision-maker.
Listing abstract concepts instead of real effects
Students often list items such as "less trust", "reduced confidence", or "weaker legitimacy" as costs or benefits.
These are not costs or benefits in themselves. If you mention such concepts, you must explain what real effects they lead to (for example worse investment decisions, higher verification costs, or more misuse of resources).
Confusing mechanisms with outcomes
Relatedly, students sometimes list the mechanism through which a rule operates as a cost or benefit.
For example, "stricter enforcement" or "higher sanctions" are not benefits by themselves. The relevant question is what these changes lead to in terms of behavior, harm reduction, resource use, or risk.
Mishandling transfers
Many rules redistribute money or risk between parties.
A common pitfall is to list only one side of a transfer (for example payments made by firms, fines paid by offenders, or compensation paid to victims) and treat this as a net cost or benefit.
Transfers cancel out in a CBA. What matters is whether the transfer changes behavior in a way that creates real gains or real losses.
Jumping to a final conclusion
Strong exam answers rarely conclude that a rule is or is not a good idea.
A common mistake is to give a decisive answer without explaining what it depends on. What matters is identifying the key factors and trade-offs, and explaining under which conditions one effect is likely to dominate another.
Being vague about what matters
Answers sometimes list many possible effects without explaining which ones are likely to matter most.
A good answer highlights the main drivers of the outcome and explains why they are important, rather than providing a long but shallow list.
Ignoring assumptions
Finally, students often rely on implicit assumptions about behavior, enforcement, or information without stating them.
Making assumptions explicit—and briefly noting how conclusions might change if they fail—signals strong understanding and is rewarded on the exam.
Limits of the Welfare Framework
Welfare analysis and cost–benefit analysis focus on aggregate outcomes and abstract from how gains and losses are distributed. A legal rule or contractual arrangement can therefore increase total surplus while shifting benefits toward some parties and away from others.
Cost–benefit analysis asks whether a rule increases total surplus, not whether everyone gains. A policy can be efficient even if some parties are made worse off, as long as the gains to the winners exceed the losses to the losers. In principle, the winners could compensate the losers and still be better off. Importantly, cost–benefit analysis does not require that such compensation actually occurs. The focus is on whether the total pie grows, not on how it is divided.
This is why efficiency and distribution are treated as separate questions. Efficiency asks whether a rule creates more value than it destroys. Distribution asks who bears the costs and who receives the benefits. Both questions matter, but they call for different tools. If a legal rule increases inequality, the key question is whether that legal rule is the most efficient way to pursue equity, or whether alternative instruments such as taxation and transfers can achieve the same distributional goals at lower cost.
Any legal rule can, in principle, be used to pursue redistribution. The relevant question is whether the chosen legal instrument achieves redistribution at lower total cost than available alternatives. In some settings—most notably labor law—interventions that restrict private contracting may redistribute income in ways that are difficult to replicate through general taxation and transfers, and may therefore be comparatively efficient way of doing redistribution.
In many other areas of private law, however—such as contract law, tort law, and litigation rules—using legal rules for redistribution is typically costly. These regimes are primarily designed to shape incentives within specific activities. When they are used to pursue distributional goals, they often distort behavior, increase transaction costs, and reduce total surplus.
Contract design provides a clear illustration. When parties are free to contract, selecting clauses that maximize total surplus is usually uncontroversial because redistribution can happen within the contract itself—through the price or other transfer terms—making both parties better off. This means there is typically no trade-off between efficiency and distribution in contract design: the parties can first agree on the allocation of rights and obligations that maximizes total surplus, and then adjust the price to divide that surplus in any way they choose. In such settings, cost–benefit analysis can be used as a practical decision rule for evaluating contractual terms.
In contrast, cost–benefit analysis should be applied with caution in domains that are explicitly designed to serve redistributive or equity-related objectives, such as health care and education. In these contexts, willingness to pay may reflect income differences rather than underlying need, and efficiency-based reasoning may conflict with broader social and legal commitments.
Throughout this book, cost–benefit analysis is used as a disciplined tool for evaluating incentives and trade-offs in business-relevant legal settings, while recognizing its limits where law serves redistributive or rights-based functions.
Consider a proposal to give a scarce kidney transplant to a richer patient rather than to a poorer patient who is earlier in the queue. If the richer patient has a higher willingness to pay for receiving the kidney sooner, a standard cost–benefit analysis may conclude that the proposal increases total surplus.
This example illustrates a core limitation of cost–benefit analysis: when willingness to pay reflects income differences, efficiency-based reasoning can favor outcomes that increase inequality. For this reason, cost–benefit analysis is particularly problematic in sectors such as health care and education, which are designed to serve redistributive and equity-related goals.
How This Chapter Is Used Later
The concepts introduced here are applied throughout the book:
- In contract law, to evaluate default rules and enforcement mechanisms.
- In competition law, to analyze market power and consumer harm.
- In criminal law and civil procedure, to study deterrence and enforcement design.
Readers should view this chapter as a toolkit rather than a destination: its value lies in repeated application rather than standalone mastery.
The Legal Incentives Model
Introduces:
- Legal Incentives Model (B, p, S)
- Risk aversion
Used in:
A central claim of law and economics is that legal rules matter because they influence behavior. Laws do not only determine who wins a case or who pays damages after the fact; they shape the incentives individuals face before they act. To understand the effects of law, we therefore need a framework for analyzing how people respond to legal rules when they make decisions.
Across very different areas of law—tort law, contract law, criminal law, civil procedure, and corporate law—the same basic question keeps reappearing: how do legal rules change the incentives of private actors? An injurer deciding how much precaution to take, a firm deciding whether to breach a contract, a potential offender deciding whether to commit a crime, or a manager deciding whether to engage in self-dealing all face a similar trade-off. Each action brings private benefits, but also exposes the actor to possible legal consequences.
The key insight of law and economics is that behavior is shaped not only by the size of legal sanctions, but also by the likelihood that those sanctions will be imposed. A severe penalty that is rarely applied may have little effect on behavior, while a modest penalty that is applied with high probability may strongly influence decisions. Legal institutions therefore matter because they determine both what happens if a rule is violated and how likely it is that this consequence actually occurs.
This chapter introduces a simple and general framework—the Legal Incentives Model—for analyzing how legal rules affect behavior. The model is intentionally minimal. It abstracts from legal doctrine and institutional detail in order to focus on the core economic logic that is common across legal fields. Later chapters will apply the same model to different areas of law by changing what counts as an action, what counts as a sanction, and how sanctions are imposed.
The purpose of the Legal Incentives Model is not to describe all aspects of human behavior or legal systems. Instead, it provides a benchmark: a simple way of thinking about how rational actors respond to incentives created by law. Understanding this benchmark is essential for analyzing when legal rules work well, when they fail, and how alternative legal designs might improve outcomes.
The core decision problem
At the heart of the Legal Incentives Model is a simple decision problem. An individual or organization must choose among different possible actions. These actions may involve effort, precaution, compliance, breach, or illegal behavior, depending on the legal context. What matters is that the choice is made before any legal authority intervenes.
Each action generates a private payoff. This payoff reflects everything the decision-maker cares about directly: monetary gains, effort costs, time, convenience, and any other private advantages or disadvantages associated with the action. Importantly, this private payoff is evaluated ignoring the legal system for the moment.
At the same time, actions may trigger legal consequences. Some actions expose the decision-maker to the risk of a legal sanction, such as paying damages, a fine, serving a prison sentence, losing a job, or suffering reputational harm. These consequences do not occur with certainty. Instead, they occur only if the legal system intervenes successfully—for example, if the actor is detected, sued, prosecuted, and found liable.
The expected impact of the legal system on behavior therefore depends on two elements. The first is the magnitude of the sanction if it occurs. The second is the probability that the sanction is imposed. This probability reflects the entire enforcement process, including detection, evidence, litigation, and adjudication. From the perspective of the decision-maker, these details matter only insofar as they affect the likelihood of actually being sanctioned.
The core idea of the Legal Incentives Model is that individuals choose actions by weighing private payoffs against expected legal consequences. An action that yields high private benefits may still be unattractive if it carries a high risk of severe sanctions. Conversely, an action that is legally prohibited may still be taken if sanctions are unlikely or mild. Legal rules influence behavior by changing either the size of sanctions, the probability that they are imposed, or both.
In the next section, we translate this intuitive trade-off into a simple mathematical formulation. This formulation will serve as the foundation for all later applications of the Legal Incentives Model throughout the book.
Principals and Agents
In many legal and business settings, one party makes decisions that affect the payoffs of another. Throughout this book, we use the terms principal and agent to describe this relationship.
A principal (prinsipal) is a party whose payoff depends on actions taken by another party. An agent (agent) is a party who takes actions that affect the principal's payoff.
The basic model
We now formalize this intuition in a simple and general model of legal incentives. An actor (an individual or a firm) faces a binary choice:
- Engage in a harmful or unlawful action, or
- Refrain from that action and comply with the law.
This binary structure captures a wide range of legal and economic settings: committing fraud or not, taking due care or not, complying with regulation or not, expropriating minority shareholders or not.
The key idea is that harmful behavior often persists not because actors misunderstand the law, but because it is privately beneficial once enforcement is taken into account.
Payoffs and expected sanctions
Let:
- \(B\) denote the private benefit from the harmful action.
- \(p\) denote the probability that the action is detected and sanctioned.
- \(S\) denote the sanction (sanksjon) imposed if the action is detected.
If the actor refrains from the harmful action, her payoff is normalized to zero.
If the actor engages in the harmful action, her expected payoff is:
\[ B - pS \]
The actor will choose the harmful action if and only if the private benefit exceeds the expected sanction:
\[ B > pS \]
This inequality is the core of the legal incentives model.
The three enforcement levers
From an incentives perspective, legal rules and governance mechanisms influence behavior through three conceptually distinct channels:
- Reducing private benefits (B)
- Increasing the probability of detection (p)
- Increasing the sanction if detected (S)
These levers provide a simple organizing framework. The following sections explain how legal rules operate through them in practice.
Legal incentives versus other motivations
The Legal Incentives Model simplifies behavior by abstracting from social norms, reputational concerns, and other non-legal motivations. This allows the model to focus on how legal rules shape incentives through three levers: the private benefit of an action, the probability that a legal sanction is imposed, and the magnitude of that sanction. Importantly, this incentive logic does not depend on the absence of social sanctions; even when reputation or repeated interaction matters, legal sanctions operate on the same margins. For a discussion of social sanctions and self-enforcement, see Self-Enforcement.
How law affects behavior
The Legal Incentives Model highlights two main channels through which law influences behavior: the magnitude of sanctions and the probability that sanctions are imposed. Legal rules and institutions operate by shifting one or both of these components.
One way the law can affect behavior is by changing the size of the sanction \(S\). Increasing damages, raising fines, or lengthening prison sentences makes sanctioned actions less attractive. All else equal, higher sanctions reduce the set of actions for which private benefit exceeds expected legal cost.
A second way the law can affect behavior is by changing the probability of a sanction \(p\). Increased monitoring, more effective policing, improved evidence rules, or lower litigation costs can all raise the likelihood that a violation is detected and punished. Even if sanctions remain unchanged, higher probabilities can substantially alter behavior.
An important implication of the model is that sanctions and probabilities can often substitute for each other. A higher probability of a sanction can compensate for a lower sanction, and vice versa. From the perspective of incentives, what matters is the expected sanction (forventet sanksjon) \(pS\). This insight plays a central role in debates about optimal enforcement, deterrence, and the design of legal institutions.
At the same time, legal rules rarely affect incentives in isolation. Changes in sanctions or probabilities may interact with each other and with the private benefit. For example, increasing sanctions may deter some actions but encourage others, such as concealment or avoidance. Similarly, raising the probability of enforcement may be costly or imperfect, and may generate unintended behavioral responses.
The model also clarifies why legal rules often operate indirectly. Law does not usually command individuals to choose a particular action; instead, it reshapes the incentives associated with different actions. By altering expected legal consequences, the law changes the private calculus that guides behavior.
From a welfare perspective, this mechanism is often described as internalizing external costs: legal rules can improve outcomes by making private actors bear costs they would otherwise impose on others. Whether this improves total surplus depends on how behavior responds and on the costs of enforcement.
In later chapters, we will see how different areas of law emphasize different margins. Criminal law often focuses on sanctions and detection. Tort law emphasizes incentives for precaution. Contract law shapes incentives for performance and breach. Civil procedure influences the probability that legal consequences materialize. Despite these differences, the underlying logic remains the same.
Simple applications
The strength of the Legal Incentives Model lies in its ability to apply across many legal settings with minimal modification. In this section, we illustrate the model using three simple examples. These examples are intentionally stylized. Their purpose is to show how very different legal problems share the same underlying incentive structure.
Crime and deterrence
Consider an individual who decides whether to commit a crime. Committing the crime generates a private benefit, such as stolen property or illicit profit. At the same time, it exposes the individual to the risk of a legal sanction, such as a fine or imprisonment.
In this setting, the private benefit \(B\) captures the gains from the crime. The sanction \(S\) represents the punishment if the individual is caught and convicted. The probability \(p\) reflects the likelihood of detection and conviction.
The individual commits the crime if the private benefit exceeds the expected sanction. Criminal law influences behavior by changing either the severity of punishment or the probability of being sanctioned. This application is often described as deterrence (avskrekking), but it is simply one instance of the Legal Incentives Model.
Precaution and accident prevention
Now consider an individual who chooses how much precaution to take in order to reduce the risk of an accident. Higher precaution is costly, but it lowers the probability or severity of harm.
Here, the private benefit \(B\) is negative, reflecting the cost of precaution. If an accident occurs and liability is imposed, the individual must pay damages, represented by the sanction \(S\). The probability \(p\) captures the likelihood that an accident occurs and leads to legal liability.
Under liability rules, individuals choose precaution by weighing the cost of precaution against the expected sanction from causing harm. Tort law shapes behavior by altering liability standards, damages, and the probability that injurers are held liable.
Breach of contract
Finally, consider a party to a contract who decides whether to perform or breach. Breach may generate a private gain, such as saving costs or pursuing a more profitable opportunity. At the same time, breach exposes the party to possible legal remedies.
In this case, the private benefit \(B\) captures the gain from breach relative to performance. The sanction \(S\) represents contract damages or penalties imposed upon breach. The probability \(p\) reflects the likelihood that the breach leads to a successful legal claim.
Contract law affects behavior by shaping remedies and enforcement. Well-designed remedies can induce efficient performance or breach by aligning private incentives with social outcomes.
These three examples illustrate how the same basic model applies across criminal law, tort law, and contract law. What changes across settings are the form of the benefit, the form of the sanction, and the institutions that determine the probability of a sanction. The underlying incentive logic, however, remains the same.
Enforcement and institutions
In the Legal Incentives Model, the probability of a sanction \(p\) plays a central role. This probability summarizes the likelihood that a given action ultimately leads to legal consequences. While the model treats \(p\) as a single value, in practice it is determined by a complex set of legal institutions and procedural rules.
The probability of a sanction depends first on detection. Some actions are easier to observe than others. Crimes committed in public may be easier to detect than concealed fraud. Accidents may be observable even when fault is difficult to establish. Legal rules that require disclosure, record-keeping, or transparency can increase the likelihood that harmful actions are detected.
Detection alone is not sufficient for a sanction to occur. Once a potential violation is detected, legal action must be initiated. In some areas of law, enforcement is public: prosecutors or regulators decide whether to pursue a case. In other areas, enforcement is private: victims must decide whether to sue. Litigation costs, fee-shifting rules, access to evidence, and procedural complexity all affect whether legal claims are brought.
Even when a case is brought, sanctions are not guaranteed. Courts may make errors, evidence may be insufficient, or legal standards may not be met. Appeals, delays, and settlement bargaining further affect whether and when sanctions are imposed. From the perspective of the actor, all of these factors reduce the probability that a sanction ultimately occurs.
The Legal Incentives Model therefore highlights why procedural law and legal institutions matter for substantive outcomes. Rules governing standing, burdens of proof, discovery, appeals, and remedies do not merely allocate cases within the legal system. They shape behavior by affecting the expected legal consequences of different actions.
This perspective also clarifies the role of non-judicial enforcement mechanisms. Auditing, monitoring by boards, reputational sanctions, and internal compliance systems all increase the probability that harmful or opportunistic behavior is sanctioned. These mechanisms operate outside the courtroom, but they influence incentives in the same way as formal legal enforcement.
Later chapters will examine in detail how different institutional arrangements affect the probability of sanctions. For now, the key point is that legal rules influence behavior not only by specifying sanctions, but also by shaping the institutional environment that determines whether sanctions are actually imposed.
Key Assumptions
The Legal Incentives Model rests on several important assumptions that should be made explicit:
- Rational, forward-looking agents: Individuals understand the incentives they face and choose actions to maximize their expected payoff. They anticipate legal consequences when making decisions.
- Risk neutrality: Individuals evaluate uncertain outcomes based on expected values. A 10% chance of a €100 sanction is treated the same as a certain €10 sanction.
- Exogenous probability of detection: The probability \(p\) that an action is detected and sanctioned is taken as given by the decision-maker. The model does not initially consider actions taken to reduce \(p\) (such as concealment or evidence destruction).
- Perfect enforcement of sanctions: If an action is detected and adjudicated, the sanction \(S\) is imposed with certainty and in full. The model abstracts from judgment-proof problems, enforcement failures, and collection difficulties.
- Individual decision-making: The model focuses on a single decision-maker. Strategic interaction among multiple parties—such as bargaining, coordination, or conflict—is not explicitly modeled here. Later chapters introduce game-theoretic tools to address these situations.
- Complete information about legal rules: Individuals know the applicable legal rules, the magnitude of sanctions, and the probability of enforcement. The model abstracts from uncertainty or misunderstanding about the law.
These assumptions are not meant to describe reality. Instead, they define a benchmark that isolates the core incentive effects of legal rules. By understanding how behavior would respond under these assumptions, we can better analyze what happens when assumptions are relaxed—for example, when individuals are risk-averse, when enforcement is imperfect, or when strategic interaction matters.
Risk aversion
The baseline Legal Incentives Model assumes that actors are risk-neutral (risikonøytrale): they evaluate uncertain sanctions based on their expected value alone. A risk-neutral actor treats a 10% probability of a €100 sanction the same as a certain €10 sanction, because both have an expected cost of €10.
In practice, many actors are risk-averse (risikoaverse). Risk-averse actors dislike uncertainty, not only expected losses. As a result, facing an uncertain sanction—a probability p of sanction S—may feel more costly than facing a certain payment equal to the expected sanction pS. This does not change the structure of the Legal Incentives Model, but it can amplify deterrence. For a given combination of detection probability and sanction magnitude, risk-averse actors may be deterred from actions that risk-neutral actors would undertake. Conversely, similar deterrence may be achieved with lower expected sanctions when actors are risk-averse.
Risk aversion is relevant across several legal contexts. It helps explain why contracts allocate risk and use insurance or guarantees, why parties may prefer settlement over uncertain litigation outcomes, and why risk-shifting behavior can arise in corporate law and insolvency. Throughout this book, analytical calculations are based on expected-value reasoning under risk neutrality. Risk aversion may be discussed informally when it helps interpret behavior or institutional design.
Limits of the model
The Legal Incentives Model is deliberately simple. Its purpose is to clarify how legal rules affect behavior through incentives and expected sanctions. Like all models, it abstracts from many features of the real world. Understanding its limits is essential for using it appropriately.
First, the model assumes that individuals are able to respond to incentives. In reality, individuals may face cognitive limitations, lack information about legal rules, or misunderstand the probability or magnitude of sanctions. Behavioral biases, such as overconfidence or present bias, may lead individuals to deviate from the predictions of the model. While these factors matter in practice, the Legal Incentives Model remains a useful benchmark for understanding how incentives would operate under rational decision-making.
Second, the model assumes that sanctions can meaningfully affect behavior. In some cases, this assumption fails. Individuals may be judgment-proof, unable to pay damages or fines. Non-monetary sanctions, such as imprisonment or reputational harm, may be costly to impose or unevenly effective. These constraints limit the ability of legal sanctions to influence behavior, especially for severe offenses or insolvent actors.
Third, the model treats the probability of a sanction as given from the perspective of the decision-maker. In reality, individuals may take actions to affect this probability, such as concealing wrongdoing, destroying evidence, or exploiting procedural complexity. Legal rules may therefore influence not only the primary action of interest, but also secondary actions aimed at avoiding enforcement.
Fourth, the model focuses on individual decision-making and does not explicitly incorporate strategic interaction among multiple actors. In many legal contexts, outcomes depend on bargaining, coordination, or conflict between parties, such as settlement negotiations or repeated interactions within firms. Later chapters introduce game-theoretic tools to analyze these situations.
Despite these limitations, the Legal Incentives Model provides a powerful starting point for economic analysis of law. By isolating the core incentive effects of legal rules, it helps clarify which features of legal design are likely to matter most and where additional institutional or behavioral considerations must be taken into account.
Why the Legal Incentives Model is reusable
The Legal Incentives Model is designed to be reused across different areas of law. While legal doctrines and institutions vary widely, the economic logic underlying many legal problems is remarkably stable. What changes across legal fields is not the structure of the decision problem, but how that structure is instantiated.
In each application of the model, three questions must be answered. First, what is the relevant action? Depending on the context, this may be a choice of precaution, performance, breach, criminal activity, effort, or self-dealing. Second, what is the private benefit associated with different actions? This captures all benefits and costs borne directly by the decision-maker. Third, what are the legal consequences of each action, and how likely are they to occur?
Different areas of law answer these questions in different ways. In tort law, the benefit is avoiding precaution costs and the sanction is damages for harm. In criminal law, the benefit is from illegal conduct and the sanction is punishment imposed by the state. In contract law, the benefit is from breach and the sanction is contractual remedies. In corporate law, the benefit may be from self-dealing and the sanction may involve liability, dismissal, or reputational loss. In civil procedure, the benefit may be from litigation strategy and the sanction may be an adverse judgment or litigation costs.
Despite these differences, the same analytical steps apply. One identifies the relevant action, specifies the private benefit, determines the expected sanction, and analyzes how changes in legal rules affect incentives. This common structure allows insights from one area of law to be transferred to another. It also allows new or unfamiliar legal rules to be analyzed systematically, even when doctrinal details are complex.
Throughout the rest of the book, the Legal Incentives Model will be used as a recurring analytical tool. Later chapters will build on this foundation by introducing additional elements, such as strategic interaction, institutional constraints, and distributional concerns. However, the core idea—that law shapes behavior by altering incentives and expected sanctions—will remain central.
How to apply the Legal Incentives Model
To apply the Legal Incentives Model to a concrete legal problem, it is useful to proceed systematically. In every application, the same three elements must be identified.
Step 1: Identify the private benefit
- What is the private benefit from the action, ignoring the legal system?
- Include all relevant benefits and costs borne by the decision-maker:
- monetary gains
- effort costs
- opportunity costs
- convenience or delay
- Examples of actions: level of precaution, whether to commit a crime, whether to perform or breach a contract, whether to sue or settle, managerial effort or self-dealing
Step 2: Identify the sanction
- What legal or institutional consequence occurs if the action is sanctioned?
- Sanctions may be legal, social, or both:
Legal sanctions:
- damages and liability payments
- fines and monetary penalties
- imprisonment and criminal punishment
- contractual penalties
- regulatory sanctions (license revocation, cease orders, etc.)
Social sanctions:
- reputational harm and loss of trust
- career costs (dismissal, reduced promotion prospects)
- exclusion from business networks
- loss of professional standing
- social stigma
Importantly, both legal and social sanctions matter for incentives. In many business and professional contexts, social sanctions—especially reputation loss—can be as powerful as formal legal sanctions. This is particularly true for:
- CEOs and senior managers (career concerns, board dismissal)
- Professionals (lawyers, accountants, auditors who rely on reputation)
- Repeat players in business relationships (suppliers, contractors, partners)
Step 3: Identify the probability of a sanction
- How likely is it that the sanction is imposed?
- This probability reflects:
- detection
- enforcement decisions
- litigation and procedure
- adjudication and error
Once these elements are identified, behavior can be analyzed using the Legal Incentives Model: \[ B - pS \]
Legal analysis then asks how changes in legal rules affect incentives by altering:
- the private benefit,
- the size of sanctions,
- or the probability that sanctions are imposed.
This step-by-step approach will be used repeatedly throughout the book and provides a general method for analyzing new legal problems.
A note on continuous actions
In many legal settings, behavior is not naturally described as a binary choice. For example, individuals may choose how much care to take and agents may vary the extent of their compliance.
The legal incentives model can be extended to such settings by allowing behavior to affect expected legal consequences. The underlying logic remains unchanged: behavior is shaped by the comparison between private costs and expected sanctions.
This extension is developed in later chapters, most notably in the analysis of tort law, where behavior affects the probability that harm occurs.
Summary
- Legal rules influence behavior by shaping incentives, not only by determining outcomes after the fact.
- The Legal Incentives Model captures this idea by focusing on private payoffs and expected legal sanctions.
- Expected sanctions depend on both the probability that a sanction is imposed and its magnitude.
- The same basic model applies across tort law, criminal law, contract law, civil procedure, and corporate law.
- Differences across legal fields reflect institutional variation, not differences in underlying incentive logic.
- The Legal Incentives Model serves as a benchmark for analyzing legal rules and institutions throughout the book.
Transaction Costs
Introduces:
- Transaction costs
- Coasean benchmark
Used in:
Many legal institutions can be understood as responses to transaction costs—the costs that prevent parties from reaching efficient agreements on their own. This chapter introduces transaction costs as a unifying concept and explains how law helps overcome them.
What Are Transaction Costs?
Transaction costs (transaksjonskostnader) are the costs of identifying trading partners, negotiating agreements, monitoring performance, and enforcing obligations. When transaction costs are low, parties can often resolve conflicts and allocate rights through private agreement. When transaction costs are high, mutually beneficial agreements may fail to occur.
In business settings, transaction costs arise from uncertainty, information asymmetries, bargaining difficulties, and enforcement problems.
Transaction Costs and Legal Rules
When transaction costs are positive, the initial allocation of legal rights matters. Legal rules influence behavior by determining who bears risk, who must take precautions, and who has the right to act or to be compensated.
From an economic perspective, legal rules can be evaluated based on how well they reduce transaction costs or mitigate their consequences. This includes:
- providing clear default rules,
- lowering enforcement costs,
- reducing information problems, and
- facilitating coordination among parties.
The Coasean benchmark
The Coasean benchmark, named after economist Ronald Coase, provides a useful theoretical point of comparison for analyzing legal rules. It asks how outcomes would be determined if parties could bargain at zero cost.
Under the Coasean benchmark, if transaction costs were zero and legal rights were clearly defined and tradable, parties would bargain to efficient outcomes regardless of the initial allocation of rights. Efficiency would be achieved through private agreement, and the law would matter only for how surplus is distributed, not for whether value is created.
The importance of the Coasean benchmark does not lie in its realism. Transaction costs are rarely zero, and bargaining is often costly or impossible. Rather, the benchmark serves as a diagnostic tool. It clarifies when legal rules affect behavior and outcomes, and when private ordering can be relied upon instead.
Throughout the book, the Coasean benchmark is used as a reference point. In later chapters, it is applied to evaluate when voluntary agreement can be treated as evidence of efficiency, and to identify the institutional and informational conditions under which this logic breaks down.
Applications Across Legal Domains
Transaction costs and the limits of private bargaining help explain the structure of many business-relevant legal institutions:
- In contract law, default rules and formal requirements reduce negotiation and enforcement costs.
- In tort law, liability rules substitute for costly private bargaining.
- In corporate law, governance structures address coordination and monitoring problems.
- In competition law, rules limit strategic behavior that exploits bargaining and coordination failures.
Throughout the book, transaction costs provide a lens for understanding why legal rules differ across contexts and why private ordering sometimes fails.
Market Power
Introduces:
- Market power
- Competitive pressure
- Substitution and market boundaries
Used in:
This chapter introduces the economic concept of market power and explains why competitive pressure cannot always be relied on to discipline behavior. Market power is a central reason why voluntary exchange and private ordering may fail to produce efficient outcomes, even when parties are rational and contracts are enforceable.
The chapter focuses on a small number of core ideas: voluntary exchange, substitution and market boundaries, market power, and entry. These concepts are introduced at a high level and without formal models. The emphasis is on economic reasoning that clarifies when competition constrains behavior and when it does not.
The analysis is organized around a simple benchmark: a market in which no individual actor can dictate terms. This benchmark is not meant to describe most real-world markets, but to clarify what it means for competitive pressure to limit pricing, exclusion, and strategic conduct. Later in the book, the competition law chapter builds directly on this framework when analyzing cartels, exclusionary conduct, and mergers.
Competitive Pressure as a Benchmark
A central reference point for understanding market power is a market in which competitive pressure is strong. In such a market, no individual buyer or seller can dictate the terms of exchange. Each participant is constrained by the presence of alternatives and must take market conditions largely as given.
Competitive pressure comes from three main sources. First, rival firms constrain behavior: if one seller raises prices or worsens quality, customers may switch to competitors. Second, customers themselves impose discipline through their ability to reduce demand, delay purchases, or turn to substitutes. Third, potential entry constrains incumbents: if prices or profits become too high, new firms may enter and compete them away.
This benchmark is not meant to describe most real-world markets. Many markets are concentrated, differentiated, or subject to regulation, and firms often have some discretion over prices or other terms. The purpose of the benchmark is instead diagnostic. It clarifies what it means for competitive pressure to be strong enough to prevent firms from worsening terms for customers.
When competitive pressure is strong, firms cannot profitably raise prices, restrict output, or degrade quality without losing business. When competitive pressure is weak, firms may be able to do so without facing effective discipline. The concept of market power captures this difference. Market power is best understood not as a particular price level or market outcome, but as a lack of effective competitive constraint.
Substitution and Market Boundaries
Competitive pressure depends on the availability of alternatives. If customers can easily switch to other products or suppliers when terms worsen, firms are constrained. If switching is difficult or impossible, firms may be able to exercise market power. The concept of substitution captures this idea.
Substitution refers to the extent to which buyers view different products, services, or suppliers as acceptable alternatives. Two products belong to the same market if a significant share of customers would switch between them in response to changes in price, quality, or other terms. If customers do not regard alternatives as close substitutes, competitive pressure is weaker.
Market boundaries—such as product scope and geographic scope—are tools for identifying where competitive constraints come from. Defining these boundaries is not an end in itself. The purpose is to assess which alternatives meaningfully discipline a firm's behavior. A narrowly defined market suggests limited substitution and potentially strong market power; a broadly defined market suggests the opposite.
In practice, market boundaries are often imprecise and contested. Substitution patterns may differ across customers, uses, or regions, and they may change over time. For this reason, market definition should be treated as a diagnostic exercise rather than a mechanical test. The key question is always the same: how easily can customers switch in response to worse terms?
What Is Market Power?
Market power (markedsmakt) is the ability of a firm, or a group of firms, to profitably worsen the terms of exchange without losing enough customers to make such behavior unprofitable. These terms may include price, quality, choice, service, or innovation. Market power is therefore best understood as a capability, not as a particular outcome.
High prices alone do not establish market power. Prices may be high because costs are high, because products are differentiated, or because firms are temporarily earning returns from successful innovation. What matters is whether a firm is constrained by competitive pressure. A firm with market power can raise prices, reduce quality, or limit output without being disciplined by rivals, customers, or potential entrants.
Market power can be exercised unilaterally or collectively. Unilateral market power arises when a single firm faces limited competitive constraints. Collective market power arises when several firms are able to coordinate their behavior, explicitly or implicitly, so that competitive pressure between them is weakened. In both cases, the defining feature is the same: reduced constraint on behavior.
Market power is often inferred rather than directly observed. Because competitive constraints cannot be measured precisely, indicators such as market shares, concentration, switching costs, and entry conditions are commonly used as proxies. These indicators are not decisive on their own. They are tools for assessing whether competitive pressure is likely to be strong or weak in a given setting.
Why Market Power Is a Problem
Market power matters because it weakens competitive pressure. When firms are insufficiently constrained by rivals, customers, or potential entry, they may be able to worsen the terms of exchange—by raising prices, reducing output, limiting choice, or weakening incentives to innovate.
The economic concern is not redistribution between buyers and sellers, but the loss of mutually beneficial exchanges. When terms worsen, some trades that would have occurred under stronger competitive pressure no longer take place. As a result, the benefits generated by voluntary exchange are reduced.
These losses are typically indirect and cannot be observed directly. Unfulfilled trades are not visible, and their value cannot be measured. For this reason, concern about market power is forward-looking: weakened competitive pressure makes sustained harm more likely over time, even when immediate effects are difficult to detect.
Entry and the Persistence of Market Power
Market power can only persist if competitive pressure from entry or expansion is limited. Even a firm that currently faces little competition may be constrained if high prices or profits would quickly attract new competitors. Entry therefore plays a central role in disciplining market power over time.
Entry typically requires incurring fixed or sunk costs—entry barriers (etableringshindringer)—such as investments in production capacity, access to key inputs, regulatory approval, or the development of reputation and distribution networks. When these costs are low and entry is timely, new firms can enter in response to profit opportunities, limiting the ability of incumbents to sustain unfavorable terms. When such costs are high, entry may be slow or unlikely, allowing market power to persist.
Conduct and institutional features often shape entry conditions. Exclusive contracts, control over essential inputs, access to data, intellectual property rights, and regulatory barriers can all affect whether potential competitors are able to enter or expand. As a result, market power is closely linked not only to current market structure, but also to the ease with which rivals can challenge incumbents.
From a dynamic perspective, the threat of entry may be as important as entry itself. Incumbents may keep prices low or invest in innovation to deter potential competitors. Conversely, behavior that weakens entry pressure can lead to sustained market power and long-run reductions in the benefits of exchange. Understanding entry is therefore essential for assessing whether market power is likely to be temporary or durable.
Information and Verifiability
Introduces:
- Asymmetric information
- Adverse selection problem
- Moral hazard problem
- Observable versus verifiable (distinction)
- Disclosure, screening, signaling (standard responses)
Used in:
Legal rules operate in environments where information is incomplete and unevenly distributed. Parties differ in what they know about relevant facts, and courts face institutional limits in determining what actually occurred. These informational constraints are a central reason why private ordering may fail and why legal institutions matter.
Information problems shape incentives, contract design, enforcement, and institutional structure across all areas of law. They influence what parties can credibly promise, what behavior can be verified, and which disputes can be resolved through legal processes.
This chapter introduces a small set of information-related concepts that recur throughout the book. The goal is not to model information in detail, but to identify the core distinctions that legal institutions must work with in practice.
Asymmetric Information
Information may be symmetric or asymmetric. Information is symmetric when all relevant parties share the same knowledge about characteristics, actions, or states of the world. It is asymmetric (asymmetrisk) when one party knows something that another party does not.
Asymmetric information is pervasive in legal and economic settings. Sellers often know more about product quality than buyers, borrowers know more about their risk than lenders, and agents know more about their effort than principals.
Information matters because it affects incentives. When relevant characteristics or actions are hidden, individuals may behave differently than they would under full information. Anticipating this, other parties adjust their behavior, prices, or willingness to contract. Efficient exchange or cooperation may fail even when it would be mutually beneficial under full information.
Throughout the book, information asymmetry is treated as a background constraint on legal and institutional design rather than as an exception.
Adverse Selection and Moral Hazard
Asymmetric information gives rise to two canonical problems that differ by timing.
Adverse selection (ugunstig utvalg) arises when one party has private information about relevant characteristics before a transaction or relationship begins. Because uninformed parties cannot distinguish types, contracts or prices may be distorted, and mutually beneficial transactions may not occur.
Examples include hidden product quality, private information about risk in insurance, or private information about ability in labor markets.
Moral hazard (moralsk risiko) arises when one party's actions after a transaction are imperfectly observed. When effort, care, or compliance cannot be monitored or verified, parties may take actions that benefit themselves while imposing costs on others.
Examples include hidden effort by employees, hidden precaution by injurers, excessive risk-taking by borrowers, or opportunistic behavior by managers.
The distinction matters because the two problems call for different institutional responses. Adverse selection primarily motivates ex ante mechanisms such as screening and disclosure, while moral hazard motivates ex post incentives, monitoring, and sanctions.
Many legal rules can be understood as responses to one or both of these problems.
Observability vs. Verifiability
A central constraint in law and economics is the distinction between observability and verifiability.
An action or outcome is observable (observerbar) if relevant parties can see or infer that it occurred. It is verifiable (verifiserbar) if it can be demonstrated to a court using admissible evidence and applicable legal standards.
Verifiability is therefore an institutional concept, not a purely factual one. It depends on evidentiary rules, procedural constraints, and the capacity of courts and enforcement agencies.
Many promises, actions, or states of the world may be observable to the parties involved yet difficult or impossible to verify legally. Anticipating this, rational parties adjust contract design, documentation, and governance structures.
Verifiability constraints help explain why legal agreements rely heavily on objective, documentable events rather than subjective assessments of effort, intent, or quality. They also explain why legal systems emphasize formality, records, and standardized procedures.
Across the book, limits of verifiability play a central role in explaining contract incompleteness, enforcement design, and institutional choice.
Standard Responses to Asymmetric Information
When information is asymmetric, parties and legal systems rely on a small set of standard mechanisms to mitigate or manage informational gaps.
Disclosure (opplysningsplikt) requires one party to reveal information to another. Mandatory disclosure is common when one party systematically holds superior information. Disclosure can reduce adverse selection but is costly and imperfect, especially when information is complex or strategically framed.
Screening
Screening occurs when the less informed party designs choices that induce the informed party to reveal information through behavior. Contract menus, procedural requirements, and eligibility criteria often serve screening functions.
Signaling
Signaling (signalisering) occurs when the informed party voluntarily undertakes a costly action to convey information about itself. For signals to be credible, they must be less costly for high-quality or compliant types than for others.
Legal rules interact with all three mechanisms by mandating disclosure, shaping which signals are legally meaningful, and constraining the design of screening devices.
Second-Best Enforcement and Institutional Design
Because information is imperfect and verifiability is limited, legal rules operate in a second-best world. Perfect accuracy is unattainable, and enforcement is costly.
As a result, legal institutions trade off accuracy, enforcement costs, and behavioral responses. Formal requirements, evidentiary thresholds, and procedural rules are not designed to uncover the truth in every case, but to create workable incentives under informational constraints.
The concepts in this chapter provide a common language for understanding how law responds to hidden information across contracts, torts, criminal law, and civil procedure. Later chapters reuse these ideas rather than reintroducing them in isolation.
Self-Enforcement
Introduces:
- Reputation
- Repeated interaction
Used in:
Legal sanctions are not the only forces that shape compliance and lawful behavior. In many settings, behavior is disciplined through self-enforcement (selvhåndhevelse) mechanisms such as reputation, repeated interaction, and social sanctions. This chapter explains when such mechanisms can sustain cooperation or compliance, and when they are likely to fail.
The Logic of Self-Enforcement
Self-enforcement can be understood as an extension of the Legal Incentives Model in which incentives arise from future interaction rather than from formal legal sanctions. In both cases, behavior is shaped by comparing the short-term private benefit of opportunistic behavior to an expected future cost. What differs is the source of that cost.
In the Legal Incentives Model, the expected cost comes from the legal system and takes the form of a sanction that is imposed with some probability. In self-enforcement, the expected cost comes from the loss of future opportunities: damaged reputation, termination of relationships, exclusion from networks, or worse terms in future transactions.
The analytical logic is therefore the same. Opportunistic behavior is deterred when its immediate private benefit is outweighed by the expected future loss it triggers. Self-enforcement replaces formal legal sanctions with privately generated incentives that depend on information and repeated interaction.
Self-enforcement operates across many legal domains. A supplier may deliver on time to preserve a long-term relationship, even when short-term breach would be profitable. A CEO may abstain from embezzling funds not only because of legal sanctions, but because reputational damage would reduce future job prospects. Similarly, professionals may comply with tort or regulatory standards to avoid exclusion from future business. In each case, behavior is disciplined by the value of future interaction rather than by immediate legal punishment.
Self-enforcement should therefore not be seen as an alternative to incentive-based reasoning, but as a different enforcement mechanism operating through the same economic logic. Later chapters examine how legal enforcement and self-enforcement interact, and when one can substitute for or complement the other.
Self-enforcement relies on incentives rather than external enforcement. An agent behaves cooperatively today in order to preserve valuable future opportunities. When self-enforcement works, formal legal enforcement may be unnecessary or play only a supporting role.
Two conditions are necessary for self-enforcement to be effective.
Condition 1: Information About Past Behavior
Future counterparties must be able to observe, or credibly infer, how an agent behaved in the past. If opportunistic behavior cannot be detected or communicated, future interactions cannot be conditioned on past actions.
Information about past behavior may come from direct experience, public records, reputational intermediaries, or informal networks. When information is noisy, delayed, or manipulable, reputational enforcement becomes weaker.
Condition 2: Value of Future Interaction
An agent must care sufficiently about future opportunities that depend on current behavior. If future gains are small relative to the short-term benefit of cheating, self-enforcement will fail.
This condition highlights the importance of repeat business, long-term relationships, and switching costs. One-shot transactions and end-game situations are especially prone to opportunistic behavior.
Reputations and Relationships
Reputations (omdømme) summarize past behavior and affect access to future transactions. They are particularly important in markets where formal enforcement is costly, slow, or incomplete.
Long-term relationships strengthen self-enforcement by increasing the value of future interaction and allowing for flexible responses to unforeseen contingencies. In such settings, informal agreements may outperform rigid formal contracts.
Limits of Self-Enforcement
Self-enforcement breaks down when either of the two conditions fails. This commonly occurs when:
- transactions are infrequent or one-shot,
- information about behavior is difficult to verify,
- parties can exit markets easily after cheating, or
- the gains from opportunism are large.
In these situations, reliance on private ordering alone may lead to inefficient outcomes.
The Role of Law
Formal legal institutions can support private ordering by improving information, increasing the cost of opportunism, and stabilizing expectations. Contract law, disclosure rules, and enforcement mechanisms often complement reputational incentives rather than replace them.
Throughout the book, self-enforcement is treated as an alternative or complement to legal enforcement. In later chapters, we return to these mechanisms when discussing contract design and compliance.
Behavior may also be influenced by social norms, moral commitments, and internalized values that operate independently of reputation or future interaction. Such motivations can lead individuals to comply with rules or obligations even when deviation would not be detected and would not affect future opportunities.
This book does not model these forces explicitly. When relevant, intrinsic motivations can be treated as part of the private benefit \(B\). Norms are discussed in this chapter only insofar as they shape reputational and relational enforcement. The formation and internalization of social norms lie outside the scope of the analytical toolkit developed here.
Sanctions and Enforcement
Economic activity often involves situations where firms or individuals can obtain private gains by taking actions that expose others to risk or impose costs on them. These actions range from underinvestment in safety and compliance to strategic misconduct such as fraud, insider trading, corruption, and money laundering. In many cases, the private benefits of such behavior are immediate, while the costs are diffuse, delayed, or borne by others.
From a business perspective, decisions about precaution, disclosure, compliance, and monitoring involve weighing costs against expected legal and reputational risks. Left unchecked, it may be privately rational to take excessive risks or to engage in misconduct even when this leads to socially inefficient outcomes.
Legal and non-legal institutions respond to these problems by altering incentives through sanctions that increase the expected cost of harmful behavior. For firms, these sanctions are an integral part of risk management and strategic decision-making. They include formal legal sanctions, such as civil liability and criminal punishment, as well as informal mechanisms like reputational damage, loss of business relationships, and exclusion from markets.
As discussed in the Foundations chapter on self-enforcement, non-legal sanctions can be powerful when information about past behavior is available and future interaction is valuable. When these conditions fail, legal sanctions play a central role in deterring harmful behavior and supporting cooperation.
Understanding how sanctions affect behavior is therefore essential for deciding how much to invest in compliance, safety, and monitoring, and for predicting how others are likely to behave.
The chapters in this part study how civil and criminal sanctions affect behavior, precaution, and deterrence when private ordering and social enforcement are insufficient. Throughout, students should keep in mind that legal sanctions often operate on top of reputational and relational mechanisms discussed in the Foundations chapter, and that the effectiveness of law depends in part on how these mechanisms interact in practice.
Criminal Law
Foundations used:
Learning goal: apply the Legal Incentives Model to analyze how criminal sanctions affect behavior and how enforcement strategies should be designed to deter harmful conduct.
Types of Questions You Should Be Able to Answer
- Why is conduct X a crime?
- How can harmful conduct X most effectively be addressed?
- How can firms through compliance avoid engaging in crime X?
🎯 Activation Question
Test your understanding before proceeding
According to the Legal Incentives Model, an actor will take an action when:
Well-functioning markets depend on trust, transparency, and fair competition. Practices such as fraud, insider trading, corruption, and money laundering distort market outcomes, undermine confidence, and allocate resources inefficiently. Criminal law plays a central role in preventing such conduct.
From a business perspective, criminal law shapes the environment in which firms operate. It affects how markets are regulated, how compliance systems are designed, and how firms organize monitoring, reporting, and internal controls. Effective criminal enforcement makes honest behavior sustainable by ensuring that misconduct does not pay, while poorly designed enforcement can create distortions, uncertainty, and excessive compliance costs.
From a public perspective, criminal law raises fundamental questions about how to deter intentional misconduct, how to allocate enforcement resources, and how to design sanctions that discourage harmful behavior without imposing unnecessary costs.
This chapter uses economic reasoning to study criminal law as a tool for market governance. The focus is on how enforcement strategies, sanctions, and compliance incentives can be designed to reduce harmful conduct, support well-functioning markets, and align private incentives with social objectives.
Criminal Law as an Application of the Legal Incentives Model
Criminal law is a direct application of the Legal Incentives Model introduced in the Foundations Toolkit. The same core logic applies: individuals choose behavior by comparing private benefits against expected legal consequences.
In the criminal law context:
- Private benefit \(B\) = gain from the criminal act (money, advantage, avoided costs)
- Probability \(p\) = likelihood of detection, prosecution, and conviction
- Sanction \(S\) = punishment (straff) if convicted (fine (bot), imprisonment (fengselsstraff), other penalties)
An individual commits a crime if and only if the private benefit exceeds the expected sanction:
\[ B > pS \]
This is exactly the baseline Legal Incentives Model. The institutional context differs—criminal law uses public enforcement and can impose imprisonment—but the incentive logic is identical to other applications.
Criminal Law as a System of Sanctions
Criminal law is one way in which the legal system seeks to deter harmful behavior. Like other areas of law, it works by changing incentives: individuals who consider engaging in harmful acts must take into account the expected legal consequences of their actions.
From an economic perspective, criminal law can be understood as a system of sanctions backed by public enforcement. The defining features of criminal law are not the moral language it employs, but its institutional design. Sanctions are imposed by the state rather than by private parties, enforcement is carried out by public authorities, and punishment may include non-monetary penalties such as imprisonment.
This chapter analyzes criminal law using the baseline Legal Incentives Model. The focus is not on doctrine, but on how criminal sanctions affect behavior.
While criminal law enforcement typically emphasizes detection probability (p) and punishment severity (S), the law also operates by reducing private benefits from crime (B). Anti-money laundering (AML) regulation illustrates this logic. Criminals with illegal proceeds must pay money launderers to convert those funds into usable form. AML laws—by criminalizing laundering and imposing sanctions on launderers—increase the fees launderers charge to compensate for their legal risk. A criminal who steals one million kroner may retain only a fraction after paying launderers' fees. By making it costly to use criminal proceeds, AML laws reduce the net benefit from the underlying crime, complementing traditional enforcement through detection and punishment.
The Economic Model of Crime and Deterrence
Consider an individual who must decide whether to engage in a criminal act.
The criminal act generates a private benefit \(B\), which may include:
- Monetary gain (theft, fraud, embezzlement)
- Avoided costs (tax evasion, regulatory non-compliance)
- Strategic advantage (insider trading, corruption)
If the act is detected and prosecuted, the individual faces a sanction \(S\), which may include:
- Monetary fines
- Imprisonment
- Loss of professional licenses or future opportunities
- Reputational harm
The probability that the sanction is imposed is \(p\), which reflects:
- Detection (monitoring, auditing, investigation)
- Prosecution decisions
- Conviction (evidence, proof standards, court outcomes)
The decision to commit a crime
The individual chooses whether to commit the crime by comparing the private benefit against the expected sanction.
Expected payoff from crime: \(B - pS\)
Expected payoff from not committing crime: 0 (normalized)
The individual commits the crime if and only if:
\[ B > pS \]
That is, when the private benefit exceeds the expected sanction.
Connection to the baseline Legal Incentives Model
This is precisely the baseline model from Chapter 6:
- Private benefit from harmful action = \(B\)
- Probability of sanction = \(p\)
- Magnitude of sanction = \(S\)
- Decision rule: engage if \(B > pS\)
The only difference is institutional: criminal law uses public enforcement and can impose imprisonment, whereas tort law uses private enforcement and compensatory damages. The incentive logic is identical.
Example: Corporate fraud
A corporate executive can engage in accounting fraud that will generate \(B = 1,000,000\) in personal benefits (bonuses, stock gains).
The probability of detection and conviction is \(p = 0.15\) (accounting fraud is difficult to detect, prosecution requires strong evidence).
If convicted, the sanction includes imprisonment valued at \(S = 5,000,000\) (years in prison plus reputational loss, future earnings).
Expected sanction: \(pS = 0.15 \times 5,000,000 = 750,000\)
The executive commits fraud if \(B > pS\), that is, if \(1,000,000 > 750,000\).
In this case, fraud is privately rational despite the severe sanction, because detection probability is low.
Detection, Punishment, and Deterrence
The model shows that criminal behavior becomes less attractive when:
- The probability of detection \(p\) increases, or
- The severity of punishment \(S\) increases
Both increase the expected sanction \(pS\).
The tradeoff between detection and punishment
From a deterrence perspective, there is a tradeoff between detection and punishment. To achieve a given level of expected sanction \(pS\):
- A higher probability \(p\) allows for lower sanctions \(S\)
- A lower probability \(p\) requires harsher sanctions \(S\)
For example, to achieve \(pS = 100,000\):
- High detection: \(p = 0.50\), \(S = 200,000\)
- Low detection: \(p = 0.10\), \(S = 1,000,000\)
Both combinations yield the same expected sanction and therefore the same deterrent effect.
Costs of enforcement
Increasing detection is costly. It requires resources devoted to:
- Policing and monitoring
- Investigation and evidence gathering
- Prosecution and adjudication
Punishment is also costly, especially imprisonment, which involves:
- Construction and operation of prisons
- Foregone productive activity of incarcerated individuals
- Social costs of separation from families and communities
An efficient criminal justice system balances these costs against the social harm prevented by deterrence.
When is eliminating all crime optimal?
The model implies that eliminating all crime is generally not optimal.
To fully deter crime requires \(pS \geq B_{max}\), where \(B_{max}\) is the highest private benefit any potential offender might obtain.
For acts with very high private benefits or very low detection probabilities, full deterrence requires extremely high sanctions or enforcement expenditures.
At some point, the marginal cost of additional enforcement exceeds the marginal benefit from deterrence. Society accepts some level of crime because further reductions are too costly.
The Limits of Monetary Sanctions
In principle, fines are an attractive form of punishment:
- Easy to administer
- Transfers rather than real resource costs (money changes hands but is not destroyed)
- Can be scaled to match the severity of the offense
However, monetary sanctions have important limitations.
Judgment-proof offenders
Many offenders are unable to pay fines that reflect the harm they cause.
If wealth is limited to \(W\), then the maximum fine that can be collected is \(S_{max} = W\).
For individuals with \(W < S^*\) (where \(S^*\) is the efficient sanction), increasing the nominal fine beyond \(W\) does not increase deterrence.
Example: An offender with \(W = 50,000\) cannot pay a fine of \(S = 500,000\). Setting the fine at \(S = 500,000\) has the same deterrent effect as \(S = 50,000\): in both cases, the maximum collectible fine is \(W = 50,000\).
Implications for criminal law
Wealth constraints explain why criminal law relies on non-monetary sanctions:
- When fines cannot be made sufficiently severe, deterrence requires imprisonment
- Non-monetary sanctions allow the legal system to impose costs that exceed offenders' wealth
- This is especially important for serious offenses where social harm is large
Imprisonment and Non-Monetary Sanctions
Imprisonment is costly and socially undesirable in many respects, but it plays a central role in criminal law.
Why imprisonment?
From an economic perspective, imprisonment's key function is deterrence when monetary sanctions are ineffective.
Imprisonment increases the expected cost of harmful behavior even when offenders have limited wealth. It imposes costs through:
- Loss of freedom and autonomy
- Foregone earnings during incarceration
- Reduced future earnings (criminal record, lost skills)
- Personal suffering
These costs can exceed an offender's current wealth, making deterrence possible when fines alone would fail.
Optimal severity of imprisonment
The model suggests that imprisonment should be used when:
- Social harm from the offense is large
- Offenders are likely to be judgment-proof
- Detection probability is low (requiring higher sanctions to maintain \(pS\))
Imprisonment should not be used when:
- Fines can provide sufficient deterrence
- Social costs of incarceration exceed benefits from additional deterrence
Other non-monetary sanctions
Criminal law also uses sanctions that operate by reducing future opportunities:
- Loss of professional licenses (lawyers, doctors, accountants)
- Exclusion from certain industries (finance, securities trading)
- Restrictions on future activities (supervised release, probation conditions)
- Reputational harm (criminal record, public disclosure)
These sanctions increase the cost of wrongdoing without requiring imprisonment.
Optimal Enforcement with Costly Detection
Detection is costly. Society must decide how much to invest in policing, monitoring, and investigation.
Let \(x\) denote enforcement effort (monitoring intensity, police presence, auditing frequency).
Higher enforcement increases detection probability: \(p = p(x)\) with \(p'(x) > 0\).
Enforcement is costly: total enforcement cost = \(C(x)\) with \(C'(x) > 0\).
Social optimization balances:
- Benefits from deterrence (reduced crime harms)
- Costs of enforcement and punishment
A classic result (Becker, 1968): if sanctions can be increased without cost, optimal policy uses maximum sanctions and minimal enforcement.
Intuition: Deterrence depends on expected sanction \(pS\). Achieving a given \(pS\) is cheaper with high \(S\) and low \(p\) (low enforcement) than with low \(S\) and high \(p\) (high enforcement).
However, this result assumes:
- Sanctions can be increased without limit
- No errors in conviction (innocent individuals are never punished)
- No concerns about proportionality or fairness
When these assumptions fail, optimal policy balances enforcement and sanctions more evenly.
Why Not Rely on Private Lawsuits?
Given that criminal law and tort law both aim to deter harmful behavior, a natural question is why society relies on criminal law at all. Why not leave enforcement entirely to private lawsuits?
There are several reasons why private enforcement may be insufficient:
Detection and information problems
- Harmful acts may go undetected without public monitoring
- Victims may not know they have been harmed (fraud, pollution)
- Evidence may be difficult for private parties to gather
Criminal law addresses these problems through:
- Public investigators with legal powers (subpoenas, search warrants)
- Dedicated enforcement agencies (police, prosecutors, regulators)
Insufficient private incentives
- Individual harms may be small relative to litigation costs
- Victims may lack resources to sue
- Benefits of deterrence are public goods (benefit everyone, not just the victim)
Criminal law addresses these problems through:
- Public enforcement funded by tax revenue
- Prosecutors who represent society's interest in deterrence
Judgment-proof offenders
- Offenders may be unable to pay compensatory damages
- Civil liability provides no deterrence when defendants lack assets
Criminal law addresses this through:
- Non-monetary sanctions (imprisonment) that do not depend on offender wealth
Complementarity of criminal and tort law
Criminal law is best understood as a complement to tort law rather than a substitute:
- Tort law: private enforcement, compensatory damages, feasible when victims can sue
- Criminal law: public enforcement, non-monetary sanctions, used when private enforcement fails
Together, they provide deterrence across a wider range of settings than either could achieve alone.
Criminal Law in Perspective
Criminal law uses public enforcement and potentially severe sanctions to deter harmful behavior that private enforcement cannot adequately address.
The economic analysis shows that:
- Deterrence depends on expected sanctions (\(pS\)), not formal rules alone
- Detection and punishment can substitute for each other in deterrence
- Monetary sanctions are limited by offender wealth
- Imprisonment allows deterrence when fines are insufficient
- Optimal enforcement balances deterrence benefits against enforcement costs
The analysis in this chapter demonstrates how the baseline Legal Incentives Model applies to criminal law: individuals choose whether to commit crimes by comparing private benefits (\(B\)) against expected sanctions (\(pS\)).
Exam Questions
Tort Law
Foundations used:
Learning goal: apply the Legal Incentives Model to precaution and liability decisions.
Types of Questions You Should Be Able to Answer
- How should a firm decide how much to invest in safety and precaution?
- When is strict liability preferable to negligence?
- How should vague legal standards like "reasonable care" be interpreted?
Consider an auditing firm deciding how thoroughly to review a client's accounts. Each additional check is costly, but reduces the risk that fraud or error goes undetected. If a problem later emerges, the auditor may be held liable for negligence. How much auditing is enough?
This type of decision is common in economic life. Firms and professionals constantly choose how much to invest in safety, verification, and monitoring, knowing that accidents and mistakes are costly but prevention is also expensive. These choices are made ex ante and are shaped by expectations about legal responsibility and liability.
Tort law plays a central role in structuring these incentives. From a private perspective, it affects how firms design production processes, how much they invest in precaution, and how detailed audits, inspections, and other safety measures should be. From a public perspective, it raises questions about deterrence, compensation, and how responsibility for harm should be allocated.
A central feature of tort law is its reliance on open-ended standards such as "reasonable care" and "due care." Law and economics provides a way to interpret these standards systematically, by viewing negligence as a failure to take cost-justified precautions. This perspective is useful both for understanding private decision-making and for analyzing how negligence is argued and assessed in court.
Tort Law as an Application of the Legal Incentives Model
This chapter applies the Legal Incentives Model to precaution decisions. The central insight remains the same: actors choose behavior by comparing private costs against expected legal consequences.
In the tort context, the agent chooses how much care to take, trading off the private cost of precaution against the expected legal cost of accidents, which equals accident probability times damages.
The baseline Legal Incentives Model (Chapter 6) used a binary choice framework: engage in a harmful action or refrain. Tort law extends this logic to precaution, where the same trade-off applies but can be analyzed first in binary form (careful vs. careless) and then refined to continuous care choices.
Tort Law as a System of Civil Liability
Tort law is a system of civil liability designed to address harmful behavior. Its most visible function is compensation: when an individual suffers harm, the injurer may be required to pay damages. From an economic perspective, however, the central role of tort law is not compensation itself, but the way liability rules affect behavior before harm occurs.
Tort law operates through private enforcement. Victims (skadelidte) initiate lawsuits, courts determine liability, and damages (erstatning) are paid to the injured party. Unlike criminal law, sanctions are compensatory rather than punitive, and enforcement does not rely on public prosecution.
Liability rules determine when damages are paid and thereby shape incentives ex ante. Understanding these incentives requires analyzing how potential injurers (skadevoldere) respond to the prospect of legal liability.
Binary Precaution: Careful vs. Careless (Bridge from Foundations)
We begin with the simplest version of the precaution problem: an actor faces a binary choice between being careful and being careless.
The decision problem
An individual or firm must choose between two actions:
- Take precaution (be "careful")
- Do not take precaution (be "careless")
Taking precaution is costly but reduces the probability of an accident.
Let:
- \(w\) = cost of taking precaution (cost of being careful)
- \(p\) = probability of an accident if careless
- \(q\) = probability of an accident if careful (where \(q < p\))
- \(A\) = harm caused by an accident
For simplicity, assume \(q = 0\): being careful eliminates accident risk entirely. This makes the comparison clearest.
Expected costs under strict liability
Under strict liability (objektivt ansvar), the actor pays damages \(A\) whenever an accident occurs.
Expected cost if careless: \(p \cdot A\)
Expected cost if careful: \(w + 0 = w\)
The actor takes precaution if and only if:
\[ w < p \cdot A \]
That is, take care when the cost of precaution is less than the expected accident loss.
Connection to the baseline model
This has exactly the same logic as the baseline Legal Incentives Model:
- Private cost of action = \(w\) (cost of being careful)
- Expected legal consequence = \(p \cdot A\) (probability × damages)
- Decision: act if private cost < expected legal consequence
The only difference is interpretation: here the "action" is taking precaution (avoiding harm) rather than engaging in harmful behavior. The incentive logic is identical.
Example: safety inspection
A manufacturing firm can conduct a thorough safety inspection at cost \(w = 5000\). Without the inspection, there is a \(p = 0.10\) probability of a workplace accident causing harm \(A = 80000\).
Under strict liability:
- Expected cost without inspection: \(0.10 \times 80000 = 8000\)
- Cost with inspection: \(5000\)
The firm inspects, since \(5000 < 8000\).
If the inspection cost were \(w = 10000\), the firm would not inspect, since \(10000 > 8000\).
Continuous Precaution: Choosing the Level of Care
In many settings, precaution is not binary but continuous. Firms choose how much to invest in safety, professionals choose how thoroughly to review work, and drivers choose how cautiously to operate vehicles.
We now extend the binary model to allow continuous choice of care level.
The continuous precaution problem
An actor chooses a level of precaution \(x \geq 0\).
Higher precaution reduces accident risk but is costly:
- \(c(x)\) = private cost of precaution level \(x\)
- Assume \(c'(x) > 0\): higher care is more costly
- Often linear: \(c(x) = w x\) where \(w\) is cost per unit of care
- \(p(x)\) = probability of an accident given care level \(x\)
- Assume \(p'(x) < 0\): more care reduces accident risk
- Assume \(p''(x) > 0\): diminishing returns to care
- \(A\) = harm caused by an accident (assumed constant)
Expected costs under strict liability
Under strict liability, the actor bears the full expected cost of accidents.
The actor chooses \(x\) to minimize total expected cost:
\[ \min_{x \geq 0} \quad c(x) + p(x) \cdot A \]
The optimal care level \(x^*\) satisfies the first-order condition:
\[ c'(x^*) = -p'(x^*) \cdot A \]
In words: choose care such that the marginal cost of additional precaution equals the marginal reduction in expected harm.
Intuition: marginal cost vs. marginal benefit
At the optimal care level:
- Marginal cost of one more unit of care = \(c'(x^*)\)
- Marginal reduction in expected harm = \(-p'(x^*) \cdot A\)
If care is below optimal (\(x < x^*\)), marginal benefit exceeds marginal cost: increasing care reduces expected total cost.
If care exceeds optimal (\(x > x^*\)), marginal cost exceeds marginal benefit: reducing care lowers expected total cost.
Social optimum
The socially efficient level of care minimizes the sum of precaution costs and expected harm:
\[ \min_{x \geq 0} \quad c(x) + p(x) \cdot A \]
This is exactly the same problem the private actor solves under strict liability. Therefore, strict liability induces socially efficient precaution.
Example: audit intensity
An auditing firm chooses how many hours \(x\) to spend reviewing a client's financial statements.
Cost of auditing: \(c(x) = 500x\) (500 per hour)
Probability of undetected fraud: \(p(x) = 0.20 e^{-0.1x}\)
Harm if fraud is undetected: \(A = 200000\)
Under strict liability, the firm minimizes: \[ 500x + 0.20 e^{-0.1x} \cdot 200000 \] \[ = 500x + 40000 e^{-0.1x} \]
First-order condition: \[ 500 = 4000 e^{-0.1x^*} \] \[ e^{-0.1x^*} = 0.125 \] \[ x^* \approx 20.8 \text{ hours} \]
The firm chooses approximately 21 hours of audit work.
Strict Liability vs. Negligence
The key difference between liability rules lies in when damages are paid.
Strict liability
Under strict liability:
- Injurer pays damages \(A\) whenever an accident occurs
- Expected legal cost = \(p(x) \cdot A\)
- Injurer minimizes: \(c(x) + p(x) \cdot A\)
Result: Injurer chooses socially optimal care level.
Negligence
Under negligence (uaktsomhet):
- Courts define a standard of care \(x^*\) (the "due care" level)
- Injurer is liable only if care falls below this standard
- If \(x \geq x^*\): no liability (even if accident occurs)
- If \(x < x^*\): full liability for harm
Damages as a function of care:
\[ S(x) = \begin{cases} A & \text{if } x < x^* \\ 0 & \text{if } x \geq x^* \end{cases} \]
Expected legal cost under negligence:
\[ \text{Expected legal cost} = \begin{cases} p(x) \cdot A & \text{if } x < x^* \\ 0 & \text{if } x \geq x^* \end{cases} \]
Injurer incentives under negligence
The injurer chooses \(x\) to minimize total expected cost:
\[ c(x) + \begin{cases} p(x) \cdot A & \text{if } x < x^* \\ 0 & \text{if } x \geq x^* \end{cases} \]
If the standard \(x^*\) is set at the socially efficient level, the injurer has a strong incentive to meet it:
- Below the standard: faces full liability
- At or above the standard: avoids liability entirely
Result: Injurer chooses \(x = x^*\) (meets the standard, does not exceed it).
Key difference: strict liability vs. negligence
Strict liability:
- Continuous incentive to reduce risk
- Injurer balances marginal cost against marginal risk reduction
- Care level responds smoothly to changes in costs or risks
Negligence:
- Discrete incentive to meet the standard
- Strong incentive to reach \(x^*\), no incentive to exceed it
- Care level jumps discontinuously at the standard
Reasonable Care and the Hand Formula
Reasonable Care and the Hand Formula
Negligence relies on legal standards such as "reasonable care" or "due care" (tilbørlig aktsomhet). From an economic perspective, these standards can be interpreted using cost–benefit logic.
Although "reasonable care" is an open-ended standard, courts do not verify care or effort directly. Instead, negligence determinations rely on verifiable proxies—such as observable precautions taken, compliance with industry standards, documented procedures, expert testimony, and the occurrence of harm—which allow courts to approximate cost-justified care while operating under evidentiary and institutional constraints (see Chapter 10 on observability and verifiability).
An influential formulation in U.S. tort law is the Hand formula, named after Judge Learned Hand, which states that an actor is negligent if the cost of precaution is less than the expected harm it would prevent.
Formally, care level \(x\) is negligent if:
\[ c(x') - c(x) < [p(x) - p(x')] \cdot A \]
for some higher care level \(x' > x\).
In other words, failing to increase care is negligent when the marginal cost of additional care is less than the marginal reduction in expected harm.
This maps directly to the efficiency condition: reasonable care corresponds to socially efficient care.
While courts rarely apply formal cost-benefit calculations, the Hand formula clarifies the economic logic underlying negligence standards.
Victim Precaution and Comparative Negligence
So far, we have focused on injurer precaution. In many settings, however, both the potential injurer and the potential victim can take precaution.
Victim incentives under strict liability
Under strict liability, victims are fully compensated for harm. As a result, they have no incentive to take precaution themselves.
This is inefficient when victim precaution is valuable.
Victim incentives under negligence
Under negligence, victims bear losses when the injurer meets the standard of care. This gives victims an incentive to take appropriate precaution.
Result: Negligence can provide efficient incentives for both injurers and victims, while strict liability efficiently motivates only injurers.
Comparative negligence
Under comparative negligence (medvirkningsansvar), damages are allocated based on the relative fault of the parties. This can provide continuous incentives for both parties to take precaution, though implementation requires courts to assess care levels for both injurer and victim.
Comparing Liability Rules
Different liability rules create different incentive structures.
Strict liability:
- Places full accident costs on injurers
- Provides continuous incentives to reduce risk
- Works well when injurers are the primary risk reducers
- Does not motivate victim precaution
Negligence:
- Provides discrete incentives to meet a behavioral standard
- Can motivate both injurer and victim precaution
- Requires courts to assess care levels
- Works well when both parties can reduce risk
The choice between liability rules involves tradeoffs related to information, enforcement costs, and the nature of the activity.
Tort Law in Perspective
Tort law uses the prospect of liability to deter harmful behavior and encourage precaution. Its effectiveness depends on the ability of courts to observe harm and, in negligence cases, to evaluate care.
When private enforcement works well and damages reflect harm, tort law can provide strong and finely tuned incentives. When these conditions fail—such as when harm is difficult to prove or injurers are judgment-proof—other legal responses may be required.
The analysis in this chapter demonstrates how the Legal Incentives Model extends from binary to continuous actions while preserving its core logic: private actors respond to legal rules by comparing the private cost of their choices against the expected legal consequences.
Exam Questions
Contracts
Why Contracts Exist
Foundations used:
Learning goal: apply commitment logic to understand when contracts enable cooperation.
Types of Questions You Should Be Able to Answer
- Why do mutually beneficial transactions sometimes fail to occur?
- When can legal enforcement solve commitment problems?
- When is self-enforcement sufficient without courts?
🎯 Activation Question
Test your understanding before proceeding
When transaction costs are high, what is the primary barrier to efficient outcomes?
Many economically valuable transactions involve cooperation over time. One party must take an action today—invest, deliver, or exert effort—while the other party’s reciprocal action occurs later. Examples include public procurement, supplier contracts with delayed payment, employment relationships, and credit agreements.
From a social perspective, many such interactions are efficient. When both parties perform as promised, total benefits exceed total costs. In principle, there exists a division of surplus that makes both sides better off.
Yet in practice, these mutually beneficial transactions often fail to occur or are carried out inefficiently. The central reason is not disagreement about prices or values, but the inability of parties to credibly commit to future behavior.
Promises alone are often insufficient. Once one party has acted, the other may have an incentive to behave opportunistically—to withhold performance, cut quality, or refuse payment. Anticipating this, rational parties may refuse to cooperate in the first place, even when cooperation would create surplus.
This is not a moral problem, but an incentive problem. Law and economics treats distrust as a predictable outcome of rational behavior under weak commitment. The economic role of contracts is therefore not merely to record promises, but to change incentives by making commitments credible.
A Simple Example: Public Procurement Without Contracts
To see how cooperation can fail even when it is efficient, consider a simplified public procurement example.
The state wants a private contractor to build a new highway and railway:
- Construction costs the contractor 1.5 (billion NOK).
- The state values the completed project at 2.
- Total surplus from completion is therefore 0.5.
From a social perspective, the project should go ahead. There exists a payment—say 1.8— that gives the contractor a payoff of 0.3 and the state a payoff of 0.2.
Now consider the interaction without a contract. The timing is as follows:
- The state decides whether to pay.
- After observing the state’s decision, the contractor decides whether to build.
The payoffs are:
- If the state pays and the contractor builds: (0.2, 0.3).
- If the state pays and the contractor does nothing: the contractor keeps the payment.
- If the state does not pay: nothing happens and both receive 0.
Only one outcome creates positive total surplus: payment followed by construction. However, this outcome is not stable when promises are unenforced.
If the state were to pay first, the contractor would then face a choice between building and keeping the payment without building. Because construction costs are incurred after payment and there is no penalty for non-performance, the contractor prefers not to build. Anticipating this incentive, the state rationally refuses to pay in the first place.
The outcome is therefore no payment, no construction, and zero surplus—despite the existence of a mutually beneficial transaction.
The Commitment Problem
The failure of cooperation in the example reflects a general commitment problem (forpliktelsesproblem). At the moment performance is required, the other party’s obligation is already sunk. Promises about future actions are therefore easy to make but costly to keep.
This logic is symmetric. If the contractor were required to build first and receive payment only after completion, the state would face the temptation not to pay. Anticipating this, the contractor would refuse to invest.
The key insight is that rational parties cannot rely on unenforced promises when actions are separated in time. Inefficient outcomes arise not because parties are irrational, but because incentives make non-cooperation individually optimal.
Contracts as Commitment Devices
Contracts solve the commitment problem by making promises costly to break. Their central economic function is to reshape incentives so that performance becomes individually optimal.
Return to the procurement example. Suppose the parties sign a legally enforceable contract specifying payment of 1.8 in exchange for construction. If the contractor fails to perform, the state can sue for breach of contract.
Assume that:
- Compensatory damages equal the state’s lost benefit of 2.
- Legal costs are 0.1 and borne by the losing party.
After receiving payment, the contractor now faces the following choice:
- Build: incur a cost of 1.5 and earn 0.3.
- Breach: pay damages of 2 plus legal costs of 0.1, yielding –0.3.
Because breach is now more costly than performance, construction becomes the contractor’s optimal action. Anticipating this, the state is willing to pay. Legal enforcement transforms the cooperative outcome into the stable outcome of rational behavior.
This result does not depend on trust or moral motivation. Even a purely self-interested party will perform when breach is sufficiently costly. Contract law substitutes for trust by providing external enforcement.
Contracts and Self-Enforcement
Legal enforcement is not the only way to make commitments credible. The same commitment problems can sometimes be addressed through private enforcement mechanisms such as reputation, repeated interaction, and the value of future trade.
Summary
This chapter has explained why contracts are necessary from an economic perspective. Many mutually beneficial transactions involve delayed exchange and relationship-specific investments. Without enforceable commitments, rational parties anticipate opportunistic behavior and may refuse to cooperate, even when cooperation would create surplus.
Contracts solve this problem by changing incentives. By making promises legally enforceable, contract law makes breach costly and performance privately optimal. In doing so, contracts convert interactions where cooperation breaks down into interactions where cooperation is sustainable.
The next chapter turns from why contracts exist to when they should be limited. Questions about when private contracts should be constrained or overridden are taken up in the chapter on the limits of private ordering.
🎯 Activation Question
Test your understanding before proceeding
A supplier considers whether to make a relationship-specific investment that would benefit a buyer. Under what condition will the supplier invest without a legally enforceable contract?
Assumptions and Robustness
The analysis assumes that breach can be observed and proven in court. When non-performance is difficult to verify—for example, when quality is subjective or effort is unobservable—legal enforcement may be ineffective even if contracts are formally enforceable. In such cases, self-enforcement mechanisms become more important.
The commitment logic requires that courts can make breach sufficiently costly. If enforcement is slow, uncertain, or damages are capped below the gains from breach, the commitment problem may persist despite formal contracts.
Takeaways
- Mutually beneficial transactions can fail when parties cannot credibly commit to future performance.
- Contracts solve commitment problems by making breach costly, aligning private incentives with cooperation.
- Legal enforcement substitutes for trust: even self-interested parties perform when sanctions exceed the gains from breach.
- Self-enforcement through reputation and repeated interaction can sometimes achieve similar results without courts.
Exam Questions
Limits of private ordering
Foundations used:
Learning goal: identify when private agreements fail to produce efficient outcomes and assess when law should facilitate or constrain private ordering.
Types of Questions You Should Be Able to Answer
- How can legal rules facilitate efficient private agreements?
- When and how should law intervene in private contracting?
🎯 Activation Question
Test your understanding before proceeding
In cost–benefit analysis, which costs and benefits should be included when evaluating a legal rule?
Enforceable contracts allow parties to solve commitment problems and cooperate over time. When contracting is cheap and effective, voluntary agreement is a powerful mechanism for creating value and allocating risk. In such settings, the fact that parties choose to contract is usually informative about whether the arrangement creates surplus.
This presumption, however, is not unconditional. Whether voluntary agreement can be trusted as a guide to welfare depends on whether the conditions underlying the Coasean benchmark plausibly hold. When these conditions fail, private agreement may no longer reliably reflect efficient incentives or outcomes.
This chapter examines when and why private contracting succeeds, when it fails, and how contract law responds. Building on the Coasean benchmark introduced in the transaction costs chapter, the central organizing principle is transaction costs broadly understood: the costs of information, negotiation, enforcement, and participation. When high transaction costs prevent efficient agreements from forming, the law plays a facilitative role by supporting private ordering. When contracts exist but agreement cannot be trusted to reflect social costs and benefits, the law plays a corrective role by shaping or constraining contractual outcomes.
The Coasean benchmark
A useful starting point for analyzing contract law is the Coasean benchmark introduced in the transaction costs chapter. As a limiting case, it highlights when private bargaining can be relied upon to produce efficient outcomes and when legal rules matter.
In applying the Coasean benchmark to real contracts, the key question is whether voluntary agreement can be treated as evidence of efficiency. This is the case only when the institutional and informational conditions required for effective bargaining plausibly hold. In particular, voluntary agreement is informative about surplus creation when:
(i) transaction costs are sufficiently low for mutually beneficial agreements to be formed and enforced, (ii) relevant information and actions are observable or verifiable, or can be credibly communicated, (iii) all materially affected parties are represented at the bargaining table, and (iv) consent is meaningful, in the sense that parties have real outside options and are not subject to coercion, extreme urgency, or severe lock-in.
When these conditions hold, private consent is a reliable guide to efficiency. Contract law should then usually take a facilitative posture: enforcing promises, supplying clear default rules, and reducing the costs of contracting and enforcement.
The Coasean benchmark is not a claim that contracts are always efficient. Rather, it provides a structured way of identifying when private agreement can be trusted as a signal of efficiency, and when legal intervention may be warranted because one or more of these conditions fail.
The Facilitative Role of Contract Law
In some settings, the logic of the Coasean benchmark remains valid in principle, but high transaction costs prevent efficient agreements from forming or being reliably enforced in practice. The potential gains from trade exist, yet private ordering fails because contracting is too costly or fragile given the available institutions.
As discussed in the transaction costs chapter, private bargaining can sustain efficient outcomes only when the costs of identifying trading partners, negotiating terms, monitoring performance, and enforcing agreements are sufficiently low. When these costs are high, voluntary agreements may fail to form altogether or may take an incomplete and unstable form, even when the underlying exchange would be mutually beneficial.
In such cases, the primary role of contract law is facilitative. The problem is not that private contracts are undesirable, but that efficient contracts are too costly to create or enforce through private ordering alone. Legal rules can improve outcomes by reducing the costs of contracting and by making commitments credible.
High transaction costs arise for many reasons. Negotiating detailed terms requires time and expertise. Anticipating and specifying all relevant future contingencies may be impossible or prohibitively expensive. Monitoring performance and enforcing obligations also consume resources and may be subject to uncertainty.
When transaction costs are high, parties may under-contract, rely on vague or informal arrangements, or avoid potentially valuable transactions altogether. Contract law can mitigate these problems by supplying default rules, standardized terms, and mechanisms for judicial gap-filling. These tools allow parties to economize on negotiation and drafting by relying on terms they would likely have chosen themselves if contracting were cheaper.
Predictable enforcement plays a central role in this facilitative function. Parties must be able to anticipate the legal consequences of performance and breach with reasonable certainty. Unpredictable or highly discretionary enforcement undermines the credibility of commitments and discourages efficient investment and cooperation.
In its facilitative role, contract law does not seek to design outcomes, correct bargaining power, or redistribute surplus. Its function is to remove impediments to private agreement and to support private ordering. This perspective is often summarized as a Normative Coasean design principle: to promote efficiency, legal rules should be structured so as to reduce the costs of contracting and enforcement, thereby allowing mutually beneficial agreements to occur.
When Should Law Intervene in Private Contracts?
Private contracts are generally respected because, under the Coasean benchmark, voluntary agreement is a reliable guide to efficient outcomes. However, private agreement is not always informative. Even when contracts are formally voluntary and legally enforceable, institutional constraints may prevent private bargaining from internalizing all relevant costs and incentives.
The central question is therefore not simply whether parties consented, but whether the conditions of the Coasean benchmark hold—whether consent reliably reflects surplus creation. When one or more conditions fail, legal intervention can improve welfare by reshaping incentives or constraining contractual outcomes. The following subsections identify the main ways in which this occurs.
Information and Incentive Problems
Here, the Coasean benchmark fails because relevant information or actions cannot be credibly observed, verified, or disciplined through contracting.
Contracts often rely on information that one party cannot observe or verify. When quality, risk, or effort is privately known, contractual terms may be based on distorted beliefs rather than accurate assessments of costs and benefits. In such settings, private agreement does not reliably reflect underlying incentives or social costs.
These problems are especially acute when performance is difficult to verify or when actions are taken after the contract is signed. Private contracts may then under-incentivize precaution, quality, or effort, or may encourage excessive risk-taking, even when both parties act voluntarily and in good faith.
Legal intervention can respond either by improving information flows or by reshaping incentives directly. Disclosure requirements, warranties, liability rules, and mandatory standards can reduce information asymmetries or substitute for missing contractual discipline. The economic justification for these interventions is not paternalism, but the need to align private incentives with underlying risks and costs when information is imperfect or unverifiable.
Missing Affected Parties
Here, the Coasean benchmark fails because not all materially affected parties are able to participate in bargaining.
Private contracts bind only those who are party to the agreement. When contractual performance imposes costs or risks on others who are not represented at the bargaining table, private consent is no longer sufficient to ensure efficiency. Even when contracting parties are well-informed and act voluntarily, their agreement may fail to reflect all relevant social costs and benefits.
The core problem in such cases is not bargaining failure among the contracting parties, but the absence of affected parties whose interests are not internalized. Third-party harms may therefore remain unaddressed, and outcomes that are privately efficient for the contracting parties may be socially inefficient.
Legal intervention can address these failures by expanding the scope of responsibility beyond the contracting parties. Liability to third parties, restrictions on certain contractual arrangements, or regulatory constraints on contract terms can force parties to take account of costs they would otherwise ignore. In economic terms, these interventions aim to internalize external effects that private contracting alone cannot capture.
Distorted Choice Environments
Here, the Coasean benchmark fails because consent no longer reliably reflects genuine alternatives or mutual gains.
In some settings, private agreement does not provide reliable evidence of efficiency because choice itself is distorted. The problem is not a lack of enforcement or hidden information, but the absence of a meaningful alternative. When exit or switching is severely constrained, agreement may reflect necessity rather than genuine mutual advantage.
At the extreme, a contract signed under a credible threat of violence—for example, when one party is forced to sign at gunpoint—provides no information about surplus creation. A signature exists, but consent is meaningless: agreement no longer signals efficiency.
Real-world cases are rarely this extreme, but similar concerns arise whenever one party faces severe constraints on exit or switching. Take-it-or-leave-it contracts, lock-in, high switching costs, or urgent necessity can all weaken the informational content of consent. In such situations, agreement may reflect the lack of alternatives rather than the efficiency of the contractual terms.
The economic concern here is not inequality as a distributive objective, but the effect that inequality can have on choice. Whether contract law should be used for redistribution is a separate question. Unequal bargaining positions matter in this context not because unequal outcomes are objectionable in themselves, but because persistent asymmetries can undermine the informational value of consent.
Summary: The Limits of Private Ordering
Private contracts are a powerful mechanism for creating value because, when the Coasean benchmark holds, voluntary agreement aligns incentives and internalizes costs. In such cases, freedom of contract combined with facilitative legal rules can sustain efficient outcomes with minimal intervention.
However, private ordering has limits. When transaction costs prevent efficient contracts from forming, the appropriate role of contract law is facilitative: to reduce the costs of contracting and enforcement so that mutually beneficial agreements can occur. When contracts exist but the Coasean benchmark fails—due to information problems, missing affected parties, or distorted choice environments—private consent is no longer a reliable guide to efficiency.
In these cases, legal intervention may improve welfare by reshaping incentives or constraining contractual outcomes. The central question is therefore not whether parties consented, but whether private agreement reliably reflects surplus creation. Where it does, freedom of contract should prevail. Where it does not, carefully designed legal intervention can enhance efficiency by restoring the link between private incentives and social costs and benefits.
🎯 Activation Question
Test your understanding before proceeding
Two sophisticated firms freely negotiate a supply contract. From a law and economics perspective, when might legal intervention in this contract still be justified?
Assumptions and Robustness
The analysis assumes that key aspects of performance are verifiable to courts at reasonable cost. When effort, quality, or precaution cannot be proven in court, parties cannot write enforceable contract terms that depend on these factors. This makes it difficult to create incentives for behavior that matters but cannot be documented. Lack of verifiability is a particular form of high transaction cost that limits what both private contracts and legal rules can achieve.
The analysis assumes that courts can enforce contracts and legal rules with reasonable accuracy, predictability, and cost. Even when relevant facts are verifiable in principle, weak court performance raises the transaction costs of contracting and litigation, reducing the value of contracts as commitment devices and limiting the effectiveness of both facilitative and corrective legal interventions. Improving enforcement quality can therefore be understood as one way of reducing transaction costs and strengthening private ordering.
Should contract law be used to reduce inequality? Economists typically argue that redistribution should be carried out through general taxes and transfers, leaving contract law to facilitate value-creating agreements. This division of labor reflects the view that redistribution is best handled by instruments designed for that purpose.
Redistribution through taxes and transfers, however, can itself be inefficient or difficult to implement. Whether contract law should be used as a redistributive tool therefore depends on whether redistribution through contract law is less costly, in efficiency terms, than redistribution through alternative instruments.
In some settings, this may plausibly be the case. For example, interventions in labor law that limit freedom of contract can redistribute surplus from capital to labor. Although such rules may distort labor market outcomes, they may still be preferable to relying on taxes on corporate income that are costly to enforce, easy to avoid, or highly mobile across jurisdictions.
Concerns about inequality arise primarily in contracts between unequals. In many business-to-business contracts—the main focus of this course—parties are typically repeat players with meaningful outside options, making distributional considerations less central than in consumer or labor contracts.
Takeaways
- The Coasean benchmark provides a baseline for evaluating contract law: voluntary agreement can be treated as evidence of efficiency only when transaction costs are low, information is reliable, all affected parties are represented, and consent is meaningful.
- When the benchmark largely holds but transaction costs prevent efficient contracts from forming, contract law should play a facilitative role by reducing the costs of negotiation, drafting, and enforcement.
- When the benchmark fails—due to information and incentive problems, missing affected parties, or distorted choice environments—private consent is no longer a reliable guide to efficiency.
- In such cases, legal intervention may improve welfare by reshaping incentives or constraining contractual outcomes so as to restore the link between private incentives and social costs and benefits.
Exam Questions
Designing Good Contracts
Foundations used:
Learning goal: apply cost–benefit analysis to the design and interpretation of contractual clauses under real-world constraints.
Types of Questions You Should Be Able to Answer
- Should clause X be included in the contract?
- How should an incomplete contract be interpreted by courts?
🎯 Activation Question
Test your understanding before proceeding
In cost–benefit analysis, which costs and benefits should be included when evaluating whether an action increases total surplus?
Many of the most important economic transactions in modern economies are governed by complex contracts. Mergers and acquisitions, large construction and infrastructure projects, shipping and energy contracts, and long-term supply agreements often involve large investments, multiple parties, and significant uncertainty about future events. Small contractual details can have large economic consequences.
Many students reading this book will find themselves working on such contracts, whether as managers, advisors, consultants, lawyers, or regulators. Even when contracts are drafted by legal specialists, business decisions about risk allocation, incentives, and enforcement play a central role in shaping their content. Understanding contracts therefore requires more than knowing legal doctrine; it requires understanding how contractual terms affect behavior and outcomes.
These contracts often run to hundreds of pages and include detailed provisions on liability, payment, termination, delay, force majeure, warranties, and dispute resolution. Law and economics provides a way to cut through this complexity. By focusing on incentives, information, and risk, it offers a simple framework for thinking systematically about why contracts are written the way they are and how they can be improved.
This chapter uses economic reasoning to analyze how contractual clauses allocate risk, create incentives, and deal with uncertainty. The goal is to evaluate contract terms using economic efficiency as a benchmark, while accounting for incentive, information, and enforcement constraints. The aim is not to teach contract drafting, but to provide a general method for assessing whether contractual clauses are likely to work well in practice.
Once you understand the logic developed in this chapter, you should be able to analyze almost any contractual clause using economic theory and assess whether it is likely to work well in practice. This is also how contract problems are assessed in this course: on the exam, you are expected to analyze an unfamiliar contract clause using the analytical method developed here.
🎯 Activation Question
Test your understanding before proceeding
A construction contract for a road project includes a clause: "The contractor must pay €50,000 for each day of delay beyond the agreed completion date." Should this clause be included in the contract?
What Does It Mean to Design a "Good" Contract?
From a legal perspective, a contract is often understood as a document that specifies rights, obligations, and remedies in the event of breach. From a law and economics perspective, a contract is something more: it is a device for shaping behavior.
The central question in contract design is not only what happens if something goes wrong, but how the contract affects behavior before anything goes wrong. Well-designed contracts encourage the parties to take desirable actions ex ante, such as effort, quality, timing, and information revelation.
Efficiency as the Guiding Principle of Contract Design
To evaluate whether a contractual clause is good or bad, we need a clear normative benchmark. In this chapter, that benchmark is economic efficiency: does the contract maximize total surplus?
Total surplus is the sum of all benefits generated by the contractual relationship minus all real resource costs. A contractual clause is efficient if it increases total surplus, even if it makes one party worse off before prices, fees, or other transfers are adjusted.
A key implication of this perspective is that efficiency and distribution can be analyzed separately. Transfers between the parties affect who gets what, but they do not affect whether a clause is socially desirable. As long as a clause increases total surplus, the parties can in principle adjust prices or other terms to divide the gains from trade.
This separation allows us to focus on the content of contracts—what clauses should be included—without taking a position on bargaining power, fairness, or legal entitlements. Those considerations matter for distribution, not for efficiency.
Efficiency therefore provides the benchmark for evaluating contractual clauses. The next step is to develop a practical method for determining whether a specific clause increases total surplus.
Cost–Benefit Analysis of Contract Clauses
Once efficiency is established as the normative benchmark, the next question is how to evaluate whether a specific contractual clause is efficient. The central analytical tool is cost–benefit analysis (CBA).
In contract design, the purpose of cost–benefit analysis is not to decide how much one party should pay the other. Instead, it is to determine whether a clause should be included at all—namely, whether it increases total surplus.
Contractual clauses create value only by changing behavior. They do not generate surplus directly, but by inducing one or both parties to act differently. Cost–benefit analysis makes this logic explicit by tracing how a clause affects real resource costs and benefits through its incentive effects.
At a high level, a cost–benefit analysis of a contractual clause asks:
- How does the clause change behavior?
- What real resource costs does this behavioral change create?
- What real resource benefits does it create?
A clause is efficient if the benefits from the induced behavioral changes exceed the associated costs.
Pure transfers between the parties should be ignored. If a clause merely shifts money from one party to the other, this affects distribution but not efficiency.
Finally, cost–benefit analysis must be applied to how a clause works in practice. Incentive effects depend on information, observability, and enforcement. The relevant question is therefore not whether a clause would be efficient in an idealized setting with perfect information and enforcement, but whether it increases total surplus given the institutional constraints under which it operates.
Efficient Allocation of Tasks and Risks
A central problem in contract design is how to allocate tasks, risks, and responsibilities between contracting parties. Different allocations can lead to very different real resource costs, even when contracts are clear and enforceable.
From an economic perspective, efficient contract design assigns tasks and risks to the party that can carry them out or bear them at the lowest total cost. Throughout this book, we refer to this idea as the efficient allocation principle.
For practical purposes, the principle can be stated as a simple question:
Who can reduce the relevant cost—through lower direct expense, better control, or improved behavior—at the lowest total cost?
This principle applies both to productive tasks and to the management of risks. When risks are controllable, efficiency favors assigning responsibility to the party best placed to influence outcomes. When risks are uncontrollable, contracts may trade off incentives against risk bearing, leading to partial rather than full allocation.
The efficient allocation of tasks and risks provides a unifying lens for analyzing many contractual clauses. The specific mechanisms through which contracts implement this principle are examined in the examples and applications that follow.
Asymmetric Information
The analysis so far has assumed that relevant information about costs, risks, and behavior is effectively shared between the parties. In many contracts, however, one party knows more than the other—either before the contract is signed or after it is performed.
Asymmetric information does not prevent contracting, but it creates incentive problems that can distort behavior and reduce total surplus. The two canonical cases are adverse selection (private information before contracting) and moral hazard (hidden actions after contracting).
From a law and economics perspective, contractual clauses such as warranties, guarantees, disclosure obligations, and cost-sharing rules are best understood as responses to these problems. Their purpose is not to eliminate informational asymmetries, but to manage their consequences.
As elsewhere in this chapter, the relevant question is whether such clauses increase total surplus. The answer depends on a cost–benefit analysis of how they change behavior: improved incentives or information revelation must be weighed against costs such as weaker effort incentives, distorted choices, or reduced insurance.
Efficient contracts therefore often rely on partial rather than full insurance, or on imperfect screening and disclosure mechanisms. The specific tools used, and the trade-offs they involve, are examined in the examples that follow.
Efficient contracts do not eliminate asymmetric information; they manage its consequences by using clauses whose incentive benefits outweigh their incentive costs.
Verifiability and Enforcement
Efficiency provides a benchmark for what parties would like to achieve through a contract. Whether those goals can be achieved in practice, however, depends on limits of verifiability and enforcement.
A contractual clause can condition rights, obligations, or remedies only on facts that a court can verify using admissible evidence. Incentive effects therefore depend not only on what the parties observe, but on what can be proven ex post.
Many economically relevant variables—such as effort, care, diligence, or intent—are observable to the parties but difficult to verify in court. Anticipating this, contracts often avoid conditioning directly on such judgments.
Instead, contracts rely on verifiable proxies: delivery dates, quantities, documented procedures, certifications, test results, or other measurable milestones. These proxies are imperfect, but enforceable.
From an economic perspective, efficient contract design therefore trades off precision against enforceability. A coarse but verifiable clause may dominate a more precise clause that cannot be reliably enforced.
The role of verifiability is not to change the efficiency benchmark, but to constrain which incentive schemes can be implemented in practice. These constraints play a central role in evaluating contractual clauses and are examined further in the examples that follow.
Efficient contract design trades off precision against enforceability, using verifiable proxies when direct conditioning on behavior or intent is not feasible.
A General Recipe for Analyzing Contract Clauses
Most contract-law questions ask whether a particular clause should be included. A good answer follows a simple comparative logic.
- Clause and counterfactual: State the clause under consideration and the relevant counterfactual contractual arrangement it is compared to (the baseline).
- Key assumptions: State the key assumptions that are relevant for the analysis.
- Incentive and behavioral effects: Explain how behavior differs between the clause and the baseline (including whether a contract is made), under the stated assumptions.
- Welfare effects: Compare total surplus with and without the clause, focusing on real resource costs and benefits rather than transfers.
- Verifiability: Assess whether the clause can work in practice given what courts can verify.
- Conditional conclusion: Conclude whether the clause increases total surplus relative to the baseline, and under which assumptions this result holds. If the clause increases total surplus, it should be included, since the contract price or other transfers can in principle be adjusted to make both parties better off.
This structure is intentionally generic and reused verbatim in example solutions.
Common Pitfalls When Analyzing Contract Clauses
The recipe above describes how contract clause analysis should be done. In practice, exam answers tend to fail in a small number of predictable ways.
Many of these mistakes are special cases of the general pitfalls discussed in Common Pitfalls When Using CBA. However, contract clause questions pose a distinctive design problem: choosing among alternative private instruments under enforcement and verifiability constraints. As a result, some pitfalls occur with particular frequency and are worth flagging explicitly here.
Ignoring verifiability
Students often propose clauses that look efficient on paper but cannot work in practice because courts cannot verify the relevant facts.
A clause conditioning on concepts such as “best efforts”, “good faith”, or “high-quality performance” may be ineffective if effort or quality is not verifiable. If a court cannot tell whether the condition has been met, the clause will not change behavior and therefore cannot improve efficiency.
Always ask whether the clause can be enforced given informational and evidentiary constraints.
Treating transfers as costs or benefits
Many contract clauses change who pays whom, when, or under which circumstances. A common mistake is to treat the payment itself as a social cost or benefit.
Transfers between the contracting parties cancel out in a welfare analysis. What matters is whether the clause changes behavior in ways that affect total surplus—for example by improving incentives, reducing risk-bearing costs, or avoiding inefficient breach.
Ignoring behavioral responses
Contract clauses change incentives, and parties respond.
A penalty clause may reduce breach, but it may also discourage contract formation if it makes the contract too risky for one party. A warranty may improve product quality, but it may also raise costs and prices.
Strong answers trace through all relevant behavioral effects, including participation, effort, precaution, and breach decisions.
Confusing efficiency with individual preferences over clauses
A very common mistake is to argue that because a clause makes one party worse off in isolation, that party should oppose the clause.
This reasoning is incorrect. If a clause increases total surplus, the parties can in principle adjust the contract price or other terms so that both parties are better off. The relevant question is therefore not whether a clause hurts one party holding prices fixed, but whether it expands the size of the pie.
Distributional effects matter for bargaining and acceptance, but they do not determine whether a clause is efficient.
Jumping to conclusions without stating assumptions
Conclusions about the efficiency of a contract clause almost always depend on assumptions about information, risk attitudes, enforcement, and outside options.
Weak answers state a bottom-line conclusion (“the clause is good” or “the clause is bad”) without explaining what it depends on. Strong answers make key assumptions explicit and briefly note how the conclusion would change if those assumptions fail.
Being clear about assumptions is often more important than reaching a particular conclusion.
🎯 Activation Question
Test your understanding before proceeding
A contract includes a clause requiring the buyer to pay a €10,000 penalty if they cancel the order. When analyzing whether this clause increases total surplus, what should you focus on?
Breach, Remedies, and Efficient Performance
Contracts specify not only what must be done, but also what happens if it is not done. Breach (kontraktsbrudd) occurs when a party fails to perform. From a law and economics perspective, remedies matter because they shape incentives before performance decisions are made.
The central question is whether remedies induce efficient performance decisions.
Performance is efficient when the value created exceeds the cost. Breach is efficient when performance would destroy value. An efficient remedy structure should therefore induce parties to perform when performance is efficient and to breach when performance is inefficient.
The standard remedy in contract law is expectation damages (positiv kontraktsinteresse), which require the breaching party to compensate the promisee for the loss from non-performance. Economically, this forces the promisor to compare the cost of performance with the cost of breach, leading to the logic of efficient breach.
From this perspective, remedies are part of contract design: they specify the cost of non-performance and determine whether parties internalize the consequences of breach.
Efficient remedies induce performance when it is efficient and breach when it avoids waste.
Interpreting Incomplete Contracts
Even carefully designed contracts are incomplete (ufullstendige). It is often too costly or impossible for the parties to specify in advance how every possible contingency should be handled. As a result, courts are frequently asked to interpret contracts that contain gaps, ambiguities, or internal inconsistencies.
From a law and economics perspective, the central question is how contracts should be interpreted in order to promote efficient behavior ex ante.
Contracts may be incomplete for many reasons—uncertainty about future events, high drafting and negotiation costs, limited foresight, or strategic ambiguity. Importantly, incompleteness does not imply failure. Leaving issues unresolved can itself be an efficient choice.
The economic approach to contract interpretation starts from a simple premise: rational parties would like their contract to be efficient. This leads to the following interpretive principle:
When a contract is incomplete, courts should impute the term that the parties would have agreed to ex ante if they had bargained over the issue.
This principle focuses on efficiency rather than fairness or bargaining power. The court asks which allocation of risk or responsibility would minimize total expected costs, given the parties’ positions and available information.
A crucial insight is that judicial interpretation affects incentives before disputes arise. If parties can predict how courts will fill gaps or resolve ambiguities, they will adjust their behavior accordingly. In this sense, contract interpretation is itself a form of contract design.
Interpreting contracts in an efficiency-oriented way therefore serves two functions: it resolves the dispute at hand and shapes incentives in future contractual relationships.
Judicial interpretation that promotes efficiency today improves contractual behavior tomorrow.
Assumptions and Robustness
The baseline analysis in this chapter assumes parties are risk neutral (evaluate outcomes based on expected values). When parties are risk averse, efficient contracts trade off incentives against risk-bearing costs. This leads to partial risk allocation rather than full assignment: the party best able to control a risk bears some but not all of it, balancing improved incentives against insurance costs.
When parties are risk averse, insurance is a natural response to contractual risk. By reducing the downside borne by the insured party, insurance lowers risk-bearing costs. However, insurance also weakens incentives to reduce the probability or severity of harm.
For this reason, efficient arrangements rarely rely on full insurance. Instead, insurance contracts typically include:
- Deductibles (insured bears first €X of loss)
- Co-insurance (insured bears Y% of loss above deductible)
- Exclusions (certain risks not covered)
- Monitoring requirements (insurer can inspect or audit)
These features preserve some exposure to loss, maintaining incentives for care while reducing risk-bearing costs. This illustrates how the incentive–insurance tradeoff created by risk aversion is managed in practice.
Worked Examples
Consider the purchase of a desk sold by a furniture retailer. The seller's standard offer is a fully assembled desk delivered to the buyer at a price of 3000. Under this arrangement, the seller assembles the desk before delivery.
Suppose the seller's real resource cost of assembling the desk is 800, using tools and standardized processes. However, shipping and storing an assembled desk is costly: it takes up more space, requires careful handling, and increases transport costs. Assume that storage and delivery costs for an assembled desk are 700.
Now consider an alternative contractual clause: flat-pack delivery. Under this option, the buyer assembles the desk at home. Suppose the buyer values the time and effort required for assembly at 900. Flat-pack delivery is cheaper to store and transport, with logistics costs of 200.
Total real resource costs under the two arrangements are therefore:
- Assembled delivery: 800 (seller assembly) + 700 (assembled logistics) = 1500
- Flat-pack delivery: 900 (buyer assembly) + 200 (flat-pack logistics) = 1100
Flat-pack delivery reduces total real costs by 400 relative to the seller's standard assembled offer. From an economic perspective, this means that offering a flat-pack option can increase total surplus.
Whether both parties prefer the flat-pack clause depends on the price adjustment. Let \(P\) denote the price of the flat-pack option.
- The buyer prefers flat-pack if: \[ P + 900 < 3000 \quad \Leftrightarrow \quad P < 2100. \]
- The seller prefers flat-pack if: \[ P - 200 > 1500 \quad \Leftrightarrow \quad P > 1700. \]
There is therefore a range of prices—any \(P\) between 1700 and 2100—for which both parties prefer flat-pack delivery. This range exists because flat-pack delivery increases total surplus by 400, and the contract price can be adjusted to divide that surplus.
The key point is that whether assembly should be included in the contract depends on total real resource costs, not on any single margin in isolation.
In the furniture example, allocating a task affected costs but not behavior. In many contracts, however, allocating responsibility also affects how parties behave. Defect liability provides a simple and important illustration.
One of the most common problems in contract design is how to ensure adequate quality. In many contractual relationships, one party chooses the quality of performance while another party bears part of the consequences of low quality.
Consider a contractor who can choose between producing high quality and low quality. High quality requires higher upfront costs but reduces the expected costs of future repairs. Low quality is cheaper to produce but leads to higher expected repair costs.
If the contractor does not bear the cost of repairs, they have an incentive to choose low quality even when high quality is socially cheaper. Assigning responsibility for defects to the contractor changes this allocation of responsibility and, as a result, changes behavior.
Suppose:
- High quality costs 100 to produce and leads to expected repair costs of 10.
- Low quality costs 90 to produce but leads to expected repair costs of 30.
From a social perspective:
- High quality: 100 + 10 = 110
- Low quality: 90 + 30 = 120
High quality is therefore efficient.
Without defect liability, the contractor compares only production costs and chooses low quality. With defect liability, the contractor internalizes expected repair costs and chooses high quality. Production costs rise by 10, but expected repair costs fall by 20, increasing total surplus.
Any increase in the contract price to compensate the contractor is a transfer and does not affect efficiency.
This example also illustrates an important limitation. Some defects arise from factors outside the contractor's control, such as poor maintenance after delivery. Efficient contracts therefore limit defect liability to construction defects and leave responsibility for maintenance-related defects with the party who controls maintenance.
Consider a public authority that tenders the construction of a road tunnel. The cost of construction depends critically on underground geological conditions. Before tendering the project, the authority conducts geological surveys and has better information about the likelihood of difficult ground conditions than potential contractors.
If contractors suspect that the authority's information is incomplete or overly optimistic, they may respond by inflating their bids to protect themselves against the risk of unexpected cost overruns. This can lead to inefficiently high prices or, in extreme cases, deter participation altogether. The underlying problem is asymmetric information: the party with better information does not fully bear the consequences of inaccurate or misleading disclosure.
One contractual response is a clause under which the authority bears the cost of additional excavation or reinforcement if actual geological conditions turn out to be worse than indicated by the survey. By shifting this risk to the informed party, the clause changes incentives before the contract is signed. The authority now internalizes the cost of providing inaccurate information and has stronger incentives to conduct careful surveys and disclose information truthfully. Contractors, in turn, can bid more aggressively when they trust the information provided.
From a cost–benefit perspective, the benefit of the clause is improved information revelation and reduced bid padding, which can lower expected procurement costs and increase the likelihood that efficient projects are undertaken.
The clause also imposes costs. By insulating the contractor from geological risk, it weakens incentives for cost control and efficient adaptation once construction begins. Contractors may exert less effort to minimize overruns when additional costs are borne by the authority. As a result, some inefficiencies may shift from the bidding stage to the performance stage.
Whether the clause increases total surplus therefore depends on a trade-off. It is more likely to be efficient when information asymmetries are severe and inaccurate disclosure would otherwise lead to large bid distortions, and less likely to be efficient when cost control during construction is crucial and largely under the contractor's control. This explains why such clauses are often limited in scope, combined with monitoring requirements, or paired with cost-sharing rules rather than providing full insurance against geological risk.
Consider a large infrastructure project that must be completed by a target date. Delays impose real social costs, such as traffic congestion and coordination problems for other projects. The contractor controls the pace of work, but the buyer and third parties cannot observe the contractor's effort directly. The completion date, however, is observable and verifiable.
Suppose that delaying completion by one day imposes a social cost of 2 million. Avoiding delay requires additional effort by the contractor.
Assume the following for the purpose of analysis:
- If the contractor finishes on time, the cost of performance is 1,500 million.
- If the contractor finishes 100 days late, the cost of performance is 1,450 million.
- Each day of delay imposes a congestion cost of 2 million.
From a social perspective:
- Finishing on time costs 1,500 million.
- Finishing 100 days late costs 1,450 + (100 × 2) = 1,650 million.
Timely completion therefore minimizes total social cost.
Without a delay penalty, the contractor compares only its private performance costs and chooses to finish late, saving 50 million. The costs imposed by delay are borne by others and do not affect the contractor's decision.
Now suppose the contract includes a delay penalty of 2 million per day of delay. The contract price is adjusted so that the expected surplus is shared between the parties.
Under this clause, delaying completion reduces the contractor's performance costs but triggers a penalty equal to the cost imposed by delay. The contractor therefore compares:
- the cost of accelerating completion, and
- the penalty avoided by doing so.
With this clause in place, the contractor chooses to finish on time, because delaying would increase total costs. The delay penalty aligns the contractor's incentives with the effects of delay on total surplus.\medskip
Force Majeure and Uncontrollable Delay
The analysis above assumes that delay is fully under the contractor's control. In many real-world projects, some delays are caused by uncontrollable events such as extreme weather, regulatory decisions, or supply-chain disruptions.
When contractors are risk averse, penalizing delays caused by such events imposes risk-bearing costs without improving incentives. Even if the expected penalty can be priced into the contract, exposing the contractor to penalties for bad luck reduces total surplus by shifting risk to the party least able to insure against it.
Force majeure clauses respond to this problem by excusing delays caused by specified uncontrollable events. By removing penalties for outcomes that effort cannot influence, these clauses preserve the incentive effects of delay penalties on controllable behavior while avoiding inefficient risk shifting.
In this sense, force majeure clauses reflect the same economic logic as other contractual responses to moral hazard: incentives should be tied to outcomes that the relevant party can affect, while uncontrollable risk is efficiently allocated or excused.\medskip
Multidimensional Effort
The analysis above assumes that the contractor's effort affects only the timing of completion. In many real-world projects, effort affects several dimensions at once, such as speed, quality, safety, or future maintenance costs. A delay penalty therefore targets only one margin of behavior: strong incentives to finish quickly may reduce effort along other, unpriced dimensions, increasing costs elsewhere. From a cost–benefit perspective, higher delay penalties strengthen timing incentives but may distort behavior on other margins, which explains why efficient contracts often combine delay penalties with additional clauses—such as defect liability, quality standards, or monitoring—rather than relying on a single high-powered incentive.
Takeaways
- Include a contractual clause if the behavioral changes it induces create real resource benefits that exceed real resource costs (ignore pure transfers between parties)
- Allocate tasks, risks, and responsibilities to the party that can handle them at lowest total cost (efficient allocation principle / least-cost avoider)
- Contractual responses to asymmetric information (warranties, guarantees, cost-sharing) trade off improved incentives or information revelation against incentive distortions or reduced insurance
- Use verifiable proxies when direct conditioning on behavior or intent is not feasible (trade-off between precision and enforceability)
- Expectation damages induce efficient breach decisions when the breaching party internalizes the harm caused to the other party
- When interpreting incomplete contracts, impute the term that minimizes total expected costs (typically assigns responsibility to the least-cost avoider)
Exam Questions
Civil Procedure
Litigation and Settlement
Foundations used:
Learning goal: analyze litigation and settlement decisions using expected value reasoning and assess how procedural rules affect enforcement incentives.
Types of Questions You Should Be Able to Answer
- When does the threat of litigation induce settlement or compliance rather than trial?
- How do litigation costs, delay, and evidentiary rules affect enforcement incentives?
- When do legal rights fail to deter opportunistic behavior?
Whether legal rules matter in practice depends on whether they can be enforced. For firms and individuals, decisions about whether to trust business partners, how much to rely on contracts, and how much to invest in compliance all depend on expectations about what happens if a dispute arises. These expectations are shaped not only by substantive law, but also by civil procedure.
Civil procedure (sivilprosess) determines how costly it is to bring a claim, how long disputes take to resolve, who bears litigation costs, and how much uncertainty parties face. These features affect bargaining positions during settlement negotiations, the credibility of legal threats, and ultimately whether parties have real incentives to abide by contracts and legal rules before disputes arise. In congested or slow court systems, or when litigation costs are high, legal rights may exist on paper but be weak in practice.
Understanding civil procedure is therefore crucial for business decisions. Without a credible possibility of enforcement, contracts lose their disciplining force and trust becomes harder to sustain. Law and economics provides a framework for analyzing when the threat of litigation (prosessføring) is credible, when disputes are likely to settle, and how procedural rules shape incentives to sue, to comply, and to cooperate.
This chapter uses economic reasoning to study litigation and settlement as part of an enforcement system shaped by procedural rules. The focus is not on procedural doctrine, but on how civil procedure affects incentives in practice, and on why the design of procedural institutions matters for both private decision-making and public policy.
To keep the analysis concrete, the chapter uses a single running business example throughout.
A Running Example: Dominant Buyer and Small Supplier
A dominant buyer has received delivery from a small supplier but withholds a payment of 100. The supplier (the plaintiff (saksøker)) can either accept the loss or bring a lawsuit against the buyer (the defendant (saksøkte)).
If the case goes to trial:
- the supplier wins with probability 80%
- if the supplier wins, the court orders the buyer to pay 100
Litigation follows a loser-pays rule (taper betaler), which is standard in Norway:
- the losing party pays both sides’ legal costs
Legal costs are:
- supplier: 15
- buyer: 25
- total legal costs: 40
The parties can also settle before trial. If they do, the settlement outcome is determined by bargaining, taking into account the expected payoffs from trial and the costs of litigation. In a later section, we introduce a simple bargaining rule to pin down where within the settlement range the parties end up.
This example will be used throughout the chapter to illustrate why lawsuits occur, why settlement is the normal outcome, and why the threat of litigation may fail to deter opportunistic behavior.
When Is a Lawsuit a Credible Threat?
A lawsuit is a credible threat when going to court yields a higher expected payoff than the available alternatives, such as ignoring the dispute or walking away. From an economic perspective, the relevant question is therefore not whether a lawsuit would succeed in court, but whether it is rational for a party to actually pursue it.
In the running example, the supplier compares the expected payoff from suing the buyer to the payoff from not enforcing its claim.
If the case goes to trial:
- If the supplier wins (80%):
- the supplier receives 100 and pays no legal costs → +100
- the buyer pays 100 plus legal costs of 40 → -140
- If the supplier loses (20%):
- the supplier pays legal costs of 40 → -40
- the buyer pays nothing → 0
The expected value of trial is therefore:
- Supplier: \(0.8 \times 100 - 0.2 \times 40 = 72\)
- Buyer: \(-0.8 \times 140 = -112\)
For the supplier, going to court is attractive relative to walking away. For the buyer, the prospect of trial is very costly. Under these conditions, the threat of litigation is credible and cannot be ignored.
More generally, a lawsuit is a credible threat when the expected trial payoff is sufficiently high relative to litigation costs and delay. Substantive and procedural legal rules affect this calculation by influencing damages, probabilities of success, and the allocation of legal costs.
Settlement as the Normal Outcome
Most disputes do not end in trial. Instead, they settle (forlik). Once a lawsuit is a credible threat, trial becomes costly and risky for both parties, while settlement allows them to avoid those costs.
In the running example, settlement involves a payment from the buyer to the supplier.
- The supplier will not accept less than 72, because trial yields an expected payoff of 72.
- The buyer will not pay more than 112, because trial costs an expected 112.
Any settlement between 72 and 112 is therefore acceptable to both parties. This range exists because settlement avoids legal costs and uncertainty associated with trial.
Settlement is thus not a failure of enforcement, but a predictable outcome of rational behavior once the threat of litigation is credible. The possibility of trial disciplines behavior even when disputes rarely reach court.
Why don’t all disputes settle in practice?
The analysis above treats settlement as the normal outcome once a lawsuit is a credible threat. In practice, however, some disputes still proceed to trial. Several mechanisms can explain this:
- Optimism and asymmetric information: parties may hold different beliefs about the strength of the case or the likelihood of winning, making agreement harder.
- Bargaining failures: even when settlement would be mutually beneficial, private information or strategic behavior may prevent agreement.
- Reputational concerns: a party may litigate to appear tough, deter future claims, or protect its standing in the market.
- Lawyer incentives: attorneys may have incentives that do not fully align with their clients’ interest in settlement.
- Precedent and non-monetary stakes: parties may care about legal precedent or future regulatory consequences, not just the immediate payoff.
These considerations help explain why trials occur in real-world legal systems. They are important for descriptive accuracy, but they are not part of the core analytical framework of this course and will not be covered on the exam.
Bargaining and the Settlement Outcome
To determine where within the settlement range the parties end up, we need a bargaining rule. In settlement analysis, a simple and widely used benchmark is Nash bargaining.
Nash bargaining treats settlement as a division of the surplus created by avoiding trial. Each party compares any proposed settlement to its outside option, defined here as the expected payoff from going to court. When the parties have equal bargaining power, Nash bargaining predicts that the surplus from settlement is split evenly relative to these outside options.
In the example:
- supplier’s expected trial payoff: \(72\)
- buyer’s expected trial payoff: \(-112\)
Avoiding trial therefore creates a total surplus of:
- \(72 + 112 = 184\)
With equal bargaining power, this surplus is divided evenly. The supplier receives its outside option plus half of the surplus:
- \(72 + 184/2 = 92\)
The predicted settlement is therefore a payment of $92 from the buyer to the supplier.
The key insight is that settlement outcomes reflect outside options, not legal entitlements alone. Even when one party is likely to win in court, settlement typically occurs below the full trial judgment because both sides benefit from avoiding litigation costs and risk.
Risk Aversion and Settlement
The analysis above assumes parties evaluate litigation by expected value alone. In practice, many parties are risk averse: they dislike uncertainty beyond its expected cost.
A risk-averse plaintiff may accept a settlement below the expected trial outcome to avoid the chance of losing entirely. Similarly, a risk-averse defendant may pay more than the expected judgment to eliminate the risk of a larger adverse verdict.
Risk aversion therefore tends to widen the settlement range, making settlement more likely. When both parties are risk averse, the zone of possible agreement expands because each side is willing to give up expected value in exchange for certainty.
This helps explain why most disputes settle even when parties disagree about the likely outcome: the shared desire to avoid risk creates room for agreement.
Procedural Rules and Bargaining Power
Procedural rules influence settlement by changing the parties' outside options.
In the example, the loser-pays rule increases the supplier's expected trial payoff and makes trial more costly for the buyer. This raises the settlement from what it would otherwise be. Even so, settlement remains below the full amount of 100.
More generally, procedural rules affect bargaining power by influencing:
- expected legal costs
- exposure to risk
- timing and delay
- access to appeals
Rules that strengthen one party's litigation position shift settlement in that party's favor, even when substantive law is unchanged.
Litigation and Ex Ante Incentives
The effects of litigation extend beyond disputes that actually reach court. Expected litigation outcomes influence behavior before any dispute arises.
In the running example, consider the buyer's decision ex ante.
If the buyer pays immediately, the cost is 100.
If the buyer withholds payment and the supplier sues, the buyer expects to settle at 92.
Even if every supplier sues, withholding is cheaper than paying immediately. Deterrence is therefore weak.
Deterrence becomes even weaker if not all suppliers sue.
Suppose only 40% of suppliers bring a lawsuit, due to fear of costs, delay, or liquidity constraints. Then the buyer's expected cost of withholding is:
- 0.4 × 92 = 36.8
In that case, withholding payment is clearly preferable to paying 100.
This illustrates a central lesson of law and economics:
Legal rules do not deter harmful behavior unless they are enforced with sufficient probability and at sufficient cost.
Delay, Impatience, and Repeat Players
Delay plays a crucial role in litigation and settlement. If trial takes a long time, a cash-constrained supplier may prefer a lower settlement today to a higher expected value later.
Anticipating this, a well-capitalized buyer can use delay strategically to weaken the supplier's bargaining position. This advantage is especially pronounced for repeat players who are involved in many similar disputes.
As a result, even strong legal claims may settle for low amounts when one party is impatient or faces liquidity constraints.
Litigation as Part of an Enforcement System
Litigation should be understood as one element in a broader enforcement system that also includes private ordering, reputational sanctions, and public enforcement.
When private enforcement is weak, settlement outcomes may fail to deter opportunistic behavior. In such settings, stronger procedural rules, collective actions, or public enforcement may be required to restore deterrence.
The purpose of civil procedure is therefore not to maximize the number of lawsuits, but to make enforcement sufficiently credible to influence behavior ex ante.
General Lessons
The running example illustrates several general insights:
- Lawsuits occur when expected trial payoffs exceed available alternatives.
- Settlement is the normal outcome of costly and risky adjudication.
- Settlement reflects bargaining power, not just legal rights.
- Procedural rules affect behavior by shaping outside options.
- Weak enforcement undermines deterrence, even when the law is clear.
- Delay and asymmetries between parties play a central role in practice.
Summary and Exam-Relevant Takeaways
Students should be able to:
- compute expected trial payoffs from probabilities, damages, and legal costs
- derive a settlement range
- explain how settlement outcomes arise from bargaining
- analyze how procedural rules affect bargaining power
- explain why the threat of litigation may fail to deter opportunism
Exam Questions
Firms and Markets
Corporate Governance
Foundations used:
- Legal Incentives Model
- Information, Evidence, and Verifiability
- Transaction Costs
- Designing Contracts
Learning goal: apply economic reasoning to analyze corporate governance mechanisms as responses to agency problems inside firms.
Types of Questions You Should Be Able to Answer
- How should corporate governance mechanisms be designed to address agency problems?
- Why does limited liability weaken deterrence in corporate law?
- What are the limits of corporate law in controlling managerial opportunism?
Modern economic activity is organized largely through corporations. Decisions about investment, risk-taking, compensation, and control are made within firms that pool capital from many investors and separate ownership from control. How these organizations are governed therefore has profound consequences for firm performance, market efficiency, and economic growth.
This separation of ownership and control creates agency problems. Managers or controlling shareholders may pursue private interests that diverge from the interests of residual claimants. Corporate law and corporate governance shape the incentives of managers, shareholders, and boards by determining who has authority to make decisions, how conflicts of interest are handled, how information is disclosed, and how misconduct is constrained.
From a business perspective, corporate law affects how firms raise capital, how they are monitored, and how strategic decisions are made under conditions of imperfect information and limited accountability. Well-designed governance systems make productive cooperation possible and channel effort toward value creation. Poorly designed systems allow opportunism, entrenchment, and excessive risk-taking.
This chapter uses economic reasoning to study corporate law and corporate governance as responses to agency problems inside the firm. The focus is not on doctrine, but on incentives: how governance structures influence behavior, how legal rules affect the probability and consequences of misconduct, and why agency problems persist even when formal legal protections exist.
Why Corporations Exist
Many economically valuable activities require large, long-term investments and the coordination of many participants. Pooling capital from multiple investors and delegating decision-making to specialized managers makes it possible to undertake projects that would be infeasible for individuals acting alone.
The corporate form facilitates this by allowing investors to contribute capital in exchange for transferable shares, while authority over day-to-day decisions is concentrated in managers or controlling owners. This separation of ownership from control enables economies of scale, specialization, and risk diversification.
From an economic perspective, the corporation can be understood as a governance structure that reduces transaction costs. Instead of relying on detailed contracts among all participants, the corporate form centralizes decision-making and provides standardized rules for control and profit sharing when contracts are incomplete.
At the same time, the features that make corporations attractive also create tensions between control and accountability. Understanding how these tensions arise, and how corporate law responds to them, is the focus of the next section.
Agency Problems in Corporations
The separation of ownership and control that characterizes the corporate form creates agency problems. Shareholders (aksjonærer) provide capital and bear the residual risk of the firm, but delegate decision-making authority to managers or controlling shareholders whose interests may diverge from maximizing firm value.
From an economic perspective, an agency problem (prinsipal–agent-problem) arises whenever the party who makes decisions does not bear the full consequences of those decisions. In corporations, those in control may enjoy private benefits that are not shared with other investors, while a significant share of the costs is borne by the firm or by dispersed shareholders.
These private benefits can take many forms. They include self-dealing and related-party transactions, excessive compensation or perquisites, empire building, entrenchment strategies that protect control, and risk-taking that benefits insiders at the expense of outside investors. Importantly, such behavior need not involve outright illegality; it often operates in gray areas where monitoring is difficult and incentives are weak.
Agency problems are especially severe in corporations because individual shareholders typically have limited incentives to monitor management. When ownership is dispersed, the gains from monitoring accrue to all shareholders, while the costs are borne privately. This makes active oversight costly and rare, even when aggregate losses are large.
As a result, the central challenge of corporate law and corporate governance is not to eliminate agency problems, but to manage them. Corporate law seeks to reduce private benefits of control and to align decision-makers' incentives more closely with the interests of residual claimants. The next section examines how corporate law can be analyzed as an incentive system designed to address these agency problems.
Corporate Law as an Application of the Legal Incentives Model
The agency problems described above can be analyzed as a direct application of the baseline Legal Incentives Model from the Foundations Toolkit. Managers and controlling shareholders choose whether to engage in opportunistic behavior by comparing private benefits against expected legal consequences.
In the corporate governance context:
- Private benefit \(B\) = gain from self-dealing, entrenchment, or excessive risk-taking
- Probability \(p\) = detection and enforcement of opportunistic behavior
- Sanction \(S\) = legal remedies, liability, dismissal, reputational harm
A manager or controlling shareholder engages in opportunistic behavior if and only if:
\[ B > pS \]
That is, when the private benefit from misconduct exceeds the expected sanction.
This is precisely the baseline model from Chapter 6. The institutional context differs—corporate governance involves internal firm decisions and private enforcement by shareholders—but the incentive logic is identical to criminal law and other applications.
Why agency problems persist
The model shows that agency problems persist when \(B > pS\), which occurs when:
Private benefits of control (\(B\)) are large:
- Self-dealing and related-party transactions
- Entrenchment (actions that protect control)
- Excessive risk-taking that benefits insiders
- Empire building and compensation extraction
Detection probability (\(p\)) is low:
- Information asymmetries (insiders control information)
- Organizational complexity
- Dispersed shareholders have limited individual incentives to monitor
- Weak board monitoring
Expected sanctions (\(S\)) are limited:
- Legal remedies uncertain or delayed
- Cases settle before trial (reducing actual sanctions)
- Limited liability caps downside risk
- Difficulty proving harm or causation
Even when formal legal rules prohibit opportunistic behavior, \(pS\) may be too small to deter misconduct.
The three levers of corporate governance
From this perspective, corporate law and corporate governance can be understood as operating through three channels:
- Reduce private benefits of control (\(B\)) — Fiduciary duties (lojalitetsplikt), disclosure requirements, limits on related-party transactions
- Increase detection probability (\(p\)) — Board monitoring, disclosure requirements, auditing, shareholder activism
- Increase sanctions (\(S\)) — Liability for breach of duty, damages, dismissal, reputational harm
The remainder of the chapter examines how governance mechanisms and legal rules operate through these three levers.
Corporate Governance as Ex Ante Incentive Design
From an economic perspective, corporate governance questions are ex ante design problems. They ask how rules governing authority, monitoring, and liability should be structured before uncertainty is resolved, in order to influence behavior inside the firm.
As in contract law, governance mechanisms can be analyzed using three complementary perspectives:
- Efficiency (total surplus): Does the governance mechanism improve incentives in a way that increases firm value by reducing agency costs?
- Asymmetric information: Does the mechanism mitigate hidden actions or hidden information by insiders, for example through disclosure, monitoring, or verification?
- Transaction costs and enforcement: Even if a mechanism is desirable in theory, can it be implemented, monitored, and enforced at reasonable cost given collective action problems and limited liability?
These perspectives mirror the structured approach used to analyze contract clauses. The difference is institutional rather than analytical: corporate governance mechanisms substitute for contractual terms that are infeasible or ineffective in large, complex organizations.
Why Not Just Increase S? Overdeterrence in Corporate Governance
Increasing legal sanctions strengthens deterrence, but it does not follow that sanctions should be set as high as possible. In corporate governance, very strong sanctions can create overdeterrence.
Managers are expected to make decisions under uncertainty and to undertake projects that are risky but value-creating in expectation. Courts, however, often observe outcomes rather than ex ante information or intent. As a result, strong sanctions may apply not only to opportunistic behavior, but also to reasonable decisions that turn out badly. Anticipating this, managers may avoid risk altogether, leading to overly conservative decision-making and reduced firm value.
High sanctions also affect who is willing to take on managerial roles. Severe and hard-to-control downside risk may require large risk premia or drive capable managers out of such positions altogether. These selection and retention effects are part of the social cost of deterrence.
Finally, very large monetary sanctions may be infeasible. Individual managers typically have limited personal wealth, so increasing nominal fines beyond a point does not increase expected sanctions in practice. This limits the effectiveness of monetary liability and explains the importance of non-monetary sanctions such as dismissal, loss of control, and reputational harm.
For these reasons, corporate governance relies on a mix of incentive instruments rather than relying exclusively on very strong liability rules. The central trade-off is between deterring opportunism and preserving efficient decision-making under uncertainty.
Incentives of Managers and Controlling Shareholders
Applying the legal incentives model to corporate settings requires identifying the private benefits that managers or controlling shareholders may obtain from opportunistic behavior. These private benefits are central to understanding why agency problems persist despite formal legal constraints.
One common source of private benefits is self-dealing. Managers or controlling shareholders may engage in related-party transactions that transfer value to themselves at the expense of the firm, for example through favorable contracts with affiliated companies or the appropriation of corporate opportunities. Even when such conduct is formally regulated, information asymmetries and complexity can make detection difficult.
Another source of private benefits is entrenchment. Those in control may take actions that reduce the risk of being replaced, such as resisting takeovers, shaping board composition, or pursuing strategies that increase firm size rather than profitability. These actions can increase private benefits of control even when they reduce firm value.
Risk-shifting is a further manifestation of agency problems. Managers or controlling shareholders may prefer strategies with high upside and substantial downside risk, particularly when losses are borne largely by diversified shareholders or creditors. From the perspective of the legal incentives model, such behavior reflects a divergence between private payoffs and social costs.
In each of these cases, opportunistic behavior is attractive when private benefits are large and when the expected legal consequences are small. Low probabilities of detection, limited sanctions, and delayed enforcement reduce the expected cost of misconduct. Corporate law seeks to address these incentive problems not by assuming away opportunism, but by altering the parameters of the legal incentives model through governance mechanisms that affect private benefits, detection, and sanctions.
The next section examines these governance mechanisms and explains how they are designed to influence incentives inside the firm.
Corporate Governance as Incentive Design
Corporate governance mechanisms can be understood as tools for modifying the parameters of the legal incentives model inside the firm. Rather than eliminating agency problems, these mechanisms seek to reduce private benefits of control and to increase the probability and consequences of detection and enforcement.
Boards of directors (styret) play a central monitoring role. By overseeing management, approving major transactions, and hiring or dismissing executives, boards are intended to increase the probability that opportunistic behavior is detected. Their effectiveness depends on independence, information, and incentives. When boards are captured by management or controlling shareholders, their ability to raise the probability of detection is limited.
Disclosure requirements operate primarily through detection. By mandating the release of financial statements and material information, disclosure reduces information asymmetries and makes opportunistic behavior more visible to shareholders, creditors, and regulators. Improved transparency can raise the expected cost of misconduct even when formal sanctions remain unchanged.
Executive compensation schemes seek to reduce private benefits of control by aligning managerial payoffs with firm performance. Performance-based pay, equity-based compensation, and long-term incentives are designed to make managers internalize some of the costs of poor decisions. At the same time, poorly designed compensation schemes can create new incentive problems, such as excessive short-termism or risk-taking.
Voting rights and control mechanisms influence incentives by affecting the threat of replacement. When shareholders can credibly discipline management through voting, the expected cost of opportunism increases. In practice, collective action problems and dispersed ownership often weaken this mechanism, especially in large firms.
From the perspective of the legal incentives model, these governance mechanisms are substitutes and complements. Strengthening one channel may reduce the need for others, but none is sufficient on its own. Their effectiveness depends on how they interact with firm-specific characteristics, ownership structures, and enforcement constraints.
The next section examines why private ordering and market mechanisms are often insufficient to control agency problems in corporations, even when governance structures are formally in place.
Limits of Private Ordering and Markets
In many areas of economic activity, contracts and market forces can discipline opportunistic behavior. In corporations, however, private ordering and market mechanisms face structural limits that make them an incomplete solution to agency problems.
Contracts are inherently limited in the corporate setting. Shareholders cannot write detailed contracts specifying how managers should respond to all future contingencies. The complexity of corporate decision-making, uncertainty about future states of the world, and the cost of drafting and enforcing detailed contracts make complete contracting infeasible. As a result, many managerial decisions remain discretionary.
Market discipline can also be weak. Exit through selling shares may discipline management when ownership is concentrated and information is transparent. However, in firms with dispersed ownership, individual shareholders often have little incentive to exit or intervene. Selling shares may simply transfer the problem to another investor rather than correcting underlying incentives.
Collective action problems further reduce the effectiveness of private ordering. Monitoring and enforcement are costly, while the benefits of successful intervention are shared among all shareholders. As a result, rational shareholders may remain passive even when aggregate losses are substantial. From the perspective of the legal incentives model, this keeps the probability of detection and enforcement low.
These limitations imply that private ordering and market mechanisms alone are often insufficient to raise the expected cost of opportunistic behavior to deterrent levels. Corporate law and governance therefore play a distinct role in supplementing contracts and markets by shaping incentives in ways that individual investors cannot achieve on their own.
The next section examines how limited liability further affects incentives by altering the expected consequences of misconduct and risk-taking.
Limited Liability and Risk-Shifting
A defining feature of the corporate form is limited liability (begrenset ansvar). Shareholders are not personally liable for the firm's obligations beyond their invested capital. This feature plays a central role in shaping incentives inside the firm.
From an economic perspective, limited liability lowers the expected cost of failure for shareholders and, indirectly, for managers acting on their behalf. By capping downside risk, limited liability encourages investment and risk-taking that would otherwise be unattractive. This benefit is one of the main reasons why the corporate form is widely used.
At the same time, limited liability weakens incentives to internalize losses. When the firm's actions impose costs on creditors or third parties, those losses may not be fully borne by shareholders. In terms of the legal incentives model, limited liability reduces the expected sanction S associated with harmful behavior, making opportunism and excessive risk-taking more attractive.
This effect is particularly important for risk-shifting. Managers or controlling shareholders may prefer projects with high upside and substantial downside risk when losses are largely externalized. Even if such strategies reduce expected firm value, they may increase private payoffs in favorable states of the world.
Limited liability therefore creates a trade-off. It facilitates capital formation and diversification, but it also amplifies agency problems by weakening the link between control and responsibility. Corporate governance and insolvency rules can be understood, in part, as attempts to manage this trade-off rather than to eliminate it.
The next section examines how incentives change as firms approach insolvency and how bankruptcy rules interact with limited liability to shape behavior.
Insolvency, Bankruptcy, and Changing Incentives
As a firm approaches insolvency, incentives inside the corporation change fundamentally. When the firm's equity is close to worthless, shareholders and managers acting on their behalf have little to lose from failure and potentially much to gain from success.
From the perspective of the legal incentives model, insolvency reduces the expected downside of risky behavior. If losses are largely borne by creditors, while gains accrue to shareholders, risk-taking becomes privately attractive even when it reduces expected firm value. This phenomenon is often described as “gambling for resurrection.”
Insolvency also sharpens conflicts among stakeholders. The interests of shareholders, managers, and creditors diverge, and governance mechanisms that work reasonably well in solvent firms may lose effectiveness. Monitoring becomes more difficult, information problems intensify, and incentives to conceal problems increase.
Bankruptcy (konkurs) rules influence these incentives by shaping expected payoffs and sanctions. The timing of bankruptcy, the treatment of existing managers, and the allocation of control during distress all affect how attractive opportunistic or high-risk strategies are before insolvency occurs. Even without detailed knowledge of bankruptcy doctrine, it is clear that these rules affect behavior ex ante by changing expected consequences.
The key lesson is that insolvency and bankruptcy do not merely resolve financial distress after the fact. They also shape incentives well before distress occurs, and thus play an important role in the overall incentive structure created by corporate law.
Detection, Enforcement, and the Probability of Sanction
In the legal incentives model, deterrence depends not only on the size of sanctions, but on the probability that misconduct is detected and enforced. In corporate settings, this probability is often low, even when formal legal rules prohibit opportunistic behavior.
Detection inside firms is difficult. Corporate decision-making is complex, information is dispersed, and insiders typically have better access to relevant facts than outside investors. Disclosure requirements and audits can improve transparency, but they rarely eliminate information asymmetries. As a result, many forms of self-dealing, entrenchment, or excessive risk-taking are hard to observe in real time.
Enforcement further reduces the effective probability of sanction. Even when misconduct is detected, dispersed shareholders face high litigation costs and limited individual incentives to sue. As discussed in the chapter on litigation and settlement, cases often settle rather than go to trial, and settlement outcomes reflect bargaining power, delay, and repeat-player advantages rather than legal entitlement alone. This can substantially reduce expected sanctions.
From the perspective of the legal incentives model, these features imply that the expected cost of misconduct, p × S, may be low even when sanctions are severe on paper. Limited detection, uncertain enforcement, and settlement dynamics all work to reduce p in practice.
This helps explain why agency problems persist in corporate settings despite formal legal protections. The mere existence of legal duties or the theoretical availability of lawsuits does not guarantee deterrence. Effective governance depends on whether legal and institutional mechanisms succeed in raising the probability and expected cost of sanction to levels that meaningfully affect behavior.
The final section draws together the main lessons of the chapter and clarifies what corporate law can, and cannot, realistically achieve from an economic perspective.
What Corporate Law Can and Cannot Achieve
The economic analysis of corporate law highlights both its importance and its limits. Corporate law exists to manage agency problems created by the separation of ownership and control, but it cannot eliminate them. Opportunism is an inherent risk of large, complex organizations, not a temporary failure of legal design.
From the perspective of the legal incentives model, corporate law operates by reducing private benefits of control and by increasing the expected cost of misconduct through detection and sanctions. Governance mechanisms, disclosure, liability rules, and insolvency regimes all affect incentives by shaping the parameters p and S. Their effectiveness depends on how they interact with firm structure, ownership patterns, and enforcement constraints.
At the same time, structural features of corporations limit deterrence. Collective action problems, information asymmetries, limited liability, and settlement dynamics often keep the expected cost of opportunistic behavior below deterrent levels. As a result, some degree of agency cost is unavoidable, even in well- designed legal systems.
The realistic objective of corporate law is therefore not to eliminate agency problems, but to reduce them to an acceptable level while preserving the benefits of the corporate form. Stronger monitoring and sanctions can improve incentives, but they also entail costs, including reduced flexibility, excessive caution, and discouraged investment.
Understanding corporate law as an incentive system clarifies these trade-offs. It shifts attention away from formal legal rules in isolation and toward the broader question of how legal and institutional arrangements influence behavior in practice.
Summary and Exam-Relevant Takeaways
- Corporations exist because they enable large-scale cooperation, but they create agency problems due to the separation of ownership and control.
- Agency problems arise from private benefits of control combined with weak monitoring, limited enforcement, and collective action problems among investors.
- Corporate law and corporate governance can be analyzed using the Legal Incentives Model, focusing on how legal rules affect private benefits (B), detection (p), and sanctions (S).
- Governance mechanisms such as boards, disclosure, fiduciary duties, and liability standards operate by reducing private benefits of opportunism, increasing the probability of detection, or raising expected sanctions.
- The same ex ante incentive-design logic used in contract analysis applies to corporate governance, but under more severe constraints on contracting, monitoring, and enforcement.
- Limited liability and insolvency weaken deterrence by reducing the expected downside of risky or opportunistic behavior.
- Detection and enforcement constraints often keep the expected cost of misconduct (p × S) below deterrent levels, even when formal legal rules exist.
- As a result, corporate law can reduce—but cannot eliminate—agency costs inside firms.
Exam Questions
Competition Law
Foundations used:
Learning goal: apply market power analysis to competition law and business strategy.
Types of Questions You Should Be Able to Answer
- When does market power become a problem for efficiency?
- How should firms think about pricing strategies under competition law?
- When are agreements between firms harmful to competition?
- How should mergers be evaluated from a competition perspective?
Competitive markets are a central mechanism for coordinating economic activity. They discipline firms, allocate resources, and generate incentives for innovation and cost reduction. When competition works well, firms are rewarded for creating value. When it fails, market power can lead to higher prices, lower quality, less innovation, and inefficient allocation of resources.
Competition law shapes the environment in which firms compete. It constrains how firms can price, contract, merge, and interact with competitors, suppliers, and customers. For businesses, these rules affect strategic decisions about pricing, market entry, vertical integration, platform design, and growth through mergers and acquisitions. For regulators, they raise questions about when market intervention is necessary and how it should be designed.
From an economic perspective, competition law is not primarily about protecting competitors, but about protecting the competitive process. Law and economics provides a framework for distinguishing practices that harm competition from those that enhance efficiency, and for understanding when market power is likely to be persistent and harmful rather than temporary or benign.
This chapter uses economic reasoning to study competition law as a tool for market design. The focus is on how legal rules affect incentives, market structure, and business behavior, and on how economic analysis can be used to assess competitive harm in concrete cases.
Introduction: Why Competition Law Exists
Competition law addresses a basic problem in market economies: while competition benefits society as a whole, individual firms often have incentives to reduce or eliminate it. When firms succeed in doing so—through coordination, exclusion, or consolidation—prices rise, output falls, and innovation may slow. The harm is not limited to the parties involved, but is borne by consumers and by society at large.
From a law-and-economics perspective, competition can be understood as a public good. Individual firms benefit from competing markets as buyers and sellers, but no single firm has an incentive to preserve competition once it can profit by weakening it. Agreements between firms, aggressive strategies by powerful incumbents, or mergers that reduce rivalry may all be privately rational while being socially harmful.
Competition law exists to address this divergence between private incentives and social welfare. Much like criminal law, it targets behavior that generates private gains but negative externalities. And much like contract law, it places limits on private agreements when those agreements harm third parties who are not represented at the bargaining table.
This chapter treats competition law not as a standalone legal field, but as an application of the same economic tools used elsewhere in the course. Firms respond to incentives, strategic interaction matters, and enforcement shapes behavior. The core question throughout the chapter is therefore not whether firms act aggressively, but whether their actions undermine the competitive process in ways that reduce overall welfare.
The goal is not to catalog legal rules, but to develop economic intuition: why certain conduct is prohibited, why other conduct is tolerated, and why competition authorities must often make decisions under uncertainty and institutional constraints.
A Running Business Example: Grocery Retail Markets
To keep the analysis concrete, this chapter uses grocery retail markets as a running business example. Grocery retail is economically simple, professionally relevant, and rich in competition-law issues. Most students are familiar with grocery stores as consumers, and many will encounter similar markets in consulting, corporate strategy, compliance, or legal practice.
A stylized grocery market consists of several large retail chains operating stores in local geographic areas. These retailers purchase products from upstream suppliers—such as food producers and brand owners—and sell them to final consumers. Entry into retail markets may be difficult due to scale economies, access to locations, logistics, and brand recognition. As a result, local markets are often concentrated, even if several national chains exist.
Competition takes place on multiple dimensions. Retailers compete on prices, product variety, quality, store locations, and promotions. At the same time, they negotiate contracts with suppliers over wholesale prices, rebates, exclusivity, and shelf space. These vertical relationships are central to how grocery markets function, but they can also affect competition between retailers and between suppliers.
Grocery retail markets therefore provide a natural setting for many of the issues addressed by competition law. Retailers may have incentives to coordinate prices or promotions. A large chain may acquire market power in certain local markets and use that power strategically. Vertical contracts may solve genuine coordination problems, but they may also foreclose rivals. Mergers between chains may reduce competitive pressure even if they generate efficiencies.
Throughout the chapter, we will return to this example and vary the facts slightly to illustrate different economic mechanisms. The goal is not to describe any specific firm or case, but to use a realistic business setting to clarify how economic reasoning is applied in competition law.
The Economic Logic of Cartels
A cartel (kartell) is an agreement or coordinated practice between competing firms to restrict competition, typically by fixing prices, limiting output, or allocating markets. From an economic perspective, the logic of cartels is straightforward: by coordinating instead of competing, firms can raise prices and increase profits.
In the grocery retail example, suppose several large retail chains agree—explicitly or implicitly—to keep prices above competitive levels. Each retailer benefits from higher margins, while consumers face higher prices and reduced choice. The gains to firms are private, while the losses to consumers are dispersed, which makes cartels attractive to firms but socially harmful.
Cartels can be understood as a repeated game. Each firm has an incentive to comply with the cartel agreement as long as others do the same. At the same time, each firm also has an incentive to deviate by slightly undercutting the cartel price in order to capture additional customers. Cartel stability therefore depends on monitoring, the ability to detect deviations, and the threat of punishment within the cartel.
Competition law intervenes because private cartel discipline replaces competitive pressure. From a welfare perspective, cartels create two types of harm. First, they generate a transfer from consumers to firms in the form of higher prices. Second, they reduce total surplus by restricting output below the socially efficient level. It is this second effect that justifies public intervention even if transfers alone are not considered socially harmful.
Cartel deterrence as an application of the Legal Incentives Model
Enforcement of cartel prohibitions is a direct application of the Legal Incentives Model from the Foundations Toolkit. Firms decide whether to engage in cartel behavior by comparing the private benefit against the expected legal consequences.
In the cartel context:
- Private benefit \(B\) = gain from coordinated pricing or output restriction (cartel profits)
- Probability \(p\) = detection and successful prosecution of the cartel
- Sanction \(S\) = fine, damages, reputational harm, and individual penalties
A firm participates in a cartel if and only if:
\[ B > pS \]
That is, when the expected benefit from collusion (konkurransebegrensende samarbeid) exceeds the expected sanction.
This is exactly the baseline Legal Incentives Model applied to cartel conduct. Firms treat expected fines and sanctions as part of their strategic decision-making, just as individuals respond to expected criminal sanctions.
Why cartels persist and how enforcement responds
Cartels persist when \(B > pS\), which occurs when:
Private benefits from collusion (\(B\)) are large:
- High margins from coordinated pricing
- Stable demand and inelastic consumers
- Concentrated markets with few competitors
Detection probability (\(p\)) is low:
- Secret agreements and covert communication
- Complex pricing structures that obscure coordination
- Limited investigative resources
Expected sanctions (\(S\)) are limited:
- Fines that are small relative to cartel gains
- Low probability of individual liability
- Difficulty proving agreement or harm
Competition law enforcement operates through three levers to deter cartels:
- Reduce private benefits (\(B\)) — Market monitoring, transparency requirements, structural remedies that make coordination harder
- Increase detection probability (\(p\)) — Leniency programs (lempningsprogram) that incentivize self-reporting, whistleblower protections, investigative powers, monitoring of industries prone to collusion
- Increase sanctions (\(S\)) — Higher fines scaled to cartel profits, individual liability for executives, damages actions by injured parties, reputational harm
Leniency programs are particularly effective because they operate primarily through \(p\): by offering immunity or reduced fines to the first firm to report, they increase the probability that cartels will be detected and destabilize trust among cartel members. This makes cartel participation less attractive even when formal sanctions remain unchanged.
The economic analysis of cartels thus fits naturally within the broader framework of incentives and enforcement developed earlier in the course. Cartels are profitable because incentives are misaligned, and competition law seeks to realign those incentives by making collusion an unprofitable strategy.
Information Exchange and Facilitating Practices
Not all coordination between firms takes the form of explicit cartel agreements. Competition law therefore also focuses on practices that make coordination easier, even when firms do not formally agree on prices or output. Information exchange is a central example of such facilitating practices.
In competitive markets, firms normally make decisions under uncertainty about their rivals' future behavior. This uncertainty disciplines competition. When firms exchange sensitive information—such as future prices, planned promotions, or intended output—they reduce that uncertainty and make it easier to coordinate on higher prices or softer competition.
Returning to the grocery retail example, consider retailers sharing information through an industry association. If retailers exchange detailed data about future pricing strategies or upcoming campaigns, each firm can better predict how rivals will behave. This reduces the incentive to compete aggressively and increases the stability of coordinated outcomes, even without an explicit agreement.
Economic reasoning helps distinguish harmful information exchange from benign or efficiency-enhancing communication. Information about past prices or aggregated historical data is less likely to facilitate coordination, because it does not allow firms to align future behavior. By contrast, information about future prices, quantities, or strategic intentions is particularly problematic, as it directly supports coordination.
Competition law restrictions on information exchange are therefore not based on formal categories, but on economic effects. The key question is whether the exchange reduces strategic uncertainty in a way that weakens competitive pressure. This approach reflects the broader logic of competition law: the concern is not communication as such, but its impact on incentives and market outcomes.
Understanding information exchange as a facilitating practice also clarifies why competition law intervenes even in the absence of explicit agreements. The objective is to protect the competitive process, not merely to punish formal collusion.
Market Power and Dominant Firms
Competition law does not prohibit firms from competing aggressively or from becoming large and successful. Instead, it pays special attention to dominant firms (dominerende foretak) with significant market power—that is, firms that face weak competitive constraints from rivals, customers, or potential entrants. Economic reasoning is essential for understanding why certain conduct becomes problematic only when market power is present.
Market power can be understood as the absence of effective outside options. A firm has market power when customers cannot easily switch to alternative suppliers, or when rivals cannot readily expand or enter the market. In grocery retail, this situation may arise in local markets where only a small number of stores are accessible to consumers, or where one chain controls a particularly attractive location.
The presence of market power changes firms' incentives. A dominant grocery chain may find it profitable to engage in practices that would be harmless or even beneficial in competitive markets. Examples include loyalty rebates, preferential shelf placement, or threats to delist certain suppliers. While such practices may reflect competition on the merits in some settings, they can also exclude rivals or raise their costs when implemented by a firm with substantial market power.
Economic analysis therefore distinguishes between exclusionary conduct and vigorous competition. Exclusionary conduct weakens competitive constraints by foreclosing rivals or deterring entry, thereby protecting or enhancing market power. Competitive conduct, by contrast, improves efficiency or benefits consumers without undermining the competitive process.
Intervening against dominant firms involves significant risks of error. Prohibiting aggressive behavior too readily may chill competition and reduce incentives to innovate or lower prices. Competition law therefore applies a cautious approach, focusing on conduct that is likely to have durable exclusionary effects rather than short-run competitive harm. This emphasis on error costs and institutional limits mirrors concerns encountered elsewhere in law and economics, particularly in areas involving forward-looking enforcement under uncertainty.
Vertical Relationships and Contractual Restraints
Firms in many markets, including grocery retail, rely on vertical contracts to organize production and distribution. Retailers and suppliers routinely agree on pricing terms, exclusivity, shelf placement, and promotional support. From an economic perspective, many of these contractual restraints are efficient responses to coordination problems and incentive misalignment.
Vertical restraints can solve well-known economic problems. For example, resale price recommendations or minimum resale prices may improve coordination between suppliers and retailers, leading to lower consumer prices. Exclusivity clauses can encourage suppliers or retailers to make relationship-specific investments by preventing other parties from benefiting without contributing. Restrictions on parallel distribution can help maintain quality or brand reputation.
At the same time, vertical restraints can also restrict competition. In grocery retail, a dominant chain that imposes exclusivity on key suppliers may prevent smaller rivals from accessing essential products. Loyalty rebates or most-favored-nation clauses may raise rivals' costs or discourage entry, even if they appear benign when viewed in isolation.
Competition law therefore evaluates vertical restraints by weighing their efficiency justifications against their potential anticompetitive effects. This analysis closely parallels the economic reasoning developed in the contracts chapter. The key difference is that competition law must consider the effects of private contracts on third parties—consumers and rival firms—who are not part of the agreement.
Understanding vertical restraints through this lens helps clarify the role of competition law as a constraint on otherwise efficient contracting. The objective is not to prohibit contractual freedom, but to prevent firms from using contracts to undermine the competitive process in ways that reduce overall welfare.
Merger Control as Ex Ante Welfare Analysis
Mergers (fusjoner) between firms can fundamentally alter market structure by reducing the number of independent competitors. Unlike cartels or exclusionary conduct, mergers are typically assessed before any harm has occurred. Merger control therefore represents an exercise in ex ante welfare analysis under uncertainty.
In grocery retail markets, mergers often involve chains with overlapping local store networks. Even if a merger generates efficiencies—such as cost savings in logistics or purchasing—it may also reduce competitive pressure in local markets, leading to higher prices or reduced quality. The central economic question is whether the loss of competition outweighs the efficiencies created by the merger.
Economic analysis of mergers focuses on how the merger changes firms' incentives. A horizontal merger may create unilateral effects by eliminating a close competitor, making price increases more profitable even without coordination. Mergers may also increase the risk of coordinated behavior by making markets more transparent or symmetric. Vertical mergers, by contrast, may raise concerns about foreclosure or access to inputs, but may also reduce transaction costs and improve coordination.
Merger control relies heavily on predictions about future market behavior. Authorities must assess entry conditions, potential efficiencies, and the durability of market power, often with limited information. This makes merger control particularly sensitive to error costs. Blocking a beneficial merger may forego efficiencies, while approving a harmful merger may lead to persistent harm that is difficult to reverse.
From a law-and-economics perspective, merger control can be seen as a constrained form of cost–benefit analysis. Decisions must be made under uncertainty, with imperfect tools and institutional limits. As elsewhere in the course, the challenge is not to identify a first-best outcome, but to design decision rules that perform reasonably well in a second-best world.
Enforcement, Remedies, and Institutional Limits
Competition law is only effective if firms expect that violations will be detected and sanctioned. As in other areas of law and economics, enforcement shapes incentives by affecting the expected cost of unlawful behavior. The design of enforcement institutions and remedies therefore plays a central role in competition policy.
Using the Legal Incentives Model framework, effective deterrence requires that the expected sanction \(pS\) exceeds the private benefit \(B\) from anticompetitive conduct. Enforcement design must therefore consider both the probability of detection \(p\) and the magnitude of sanctions \(S\).
The primary sanctions in competition law are fines and, in some jurisdictions, damages actions by injured parties. Fines increase \(S\) and are intended to deter firms from engaging in cartels or abusive conduct by outweighing the expected gains from anticompetitive behavior. However, as with criminal sanctions, deterrence depends not only on the size of fines \(S\), but also on the probability of detection \(p\). Leniency programs and investigative powers are designed to increase \(p\) and destabilize illegal coordination by making detection more likely.
In addition to monetary sanctions, competition authorities may impose remedies. Behavioral remedies require firms to change specific practices, such as modifying contracts or information-sharing arrangements. Structural remedies, such as divestitures in merger cases, aim to restore competitive conditions by altering market structure directly. Each type of remedy involves trade-offs between effectiveness, administrative complexity, and the risk of unintended consequences.
Enforcement is subject to significant institutional limits. Competition authorities operate with limited information, finite resources, and imperfect predictive tools. Courts reviewing competition decisions face similar constraints and must balance deference to expertise against the risk of error. These limits imply that competition law cannot eliminate all anticompetitive behavior without also risking excessive intervention.
From an economic perspective, enforcement design involves managing trade-offs between under- and over-enforcement. Weak enforcement may fail to deter harmful conduct because \(pS\) remains too low, while aggressive enforcement may chill legitimate competition and efficient contracting by imposing excessive expected costs. Recognizing these trade-offs helps explain why competition law relies on relatively high evidentiary standards and cautious intervention, particularly in cases involving unilateral conduct or complex market dynamics.
Norwegian and European Illustrations
The economic logic developed in this chapter can be illustrated using Norwegian and European competition cases, many of which arise in markets similar to the grocery retail example. While legal rules and procedures vary across jurisdictions, the underlying economic reasoning is largely the same.
Norwegian cases involving grocery retail and supplier relations highlight how buyer power and vertical contracts can shape competition. Investigations into pricing practices, exclusivity clauses, and negotiations with suppliers illustrate the difficulty of distinguishing aggressive bargaining from conduct that forecloses rivals. These cases show how competition authorities rely on economic reasoning about incentives, entry barriers, and market structure rather than formal labels.
Cases involving dominant firms, such as those in the dairy sector, illustrate the challenges of assessing exclusionary conduct. Aggressive pricing or rebate schemes may benefit consumers in the short run, but they can also deter entry or expansion by rivals. Norwegian and European authorities have therefore emphasized the need to assess likely long-run effects on competition, while remaining cautious about intervening against behavior that may reflect competition on the merits.
Cartel cases in construction and other industries provide clear examples of how enforcement targets coordinated behavior that is almost always harmful. These cases illustrate the logic of deterrence, the role of leniency programs, and the importance of detection probability. They also show why competition law treats cartels more strictly than other forms of anticompetitive conduct.
European merger cases, including those affecting retail and consumer goods markets, illustrate merger control as forward-looking welfare analysis. Authorities must balance potential efficiencies against risks to competition, often under considerable uncertainty. Norwegian practice, shaped by European competition law, reflects the same emphasis on economic effects rather than formalistic rules.
Taken together, these illustrations reinforce a central theme of the chapter: competition law is best understood as applied economic reasoning under institutional constraints, rather than as a collection of rigid legal doctrines.
Summary and Connections to the Rest of the Course
This chapter has presented competition law as an application of the core economic tools developed throughout the course. Firms respond to incentives, strategic interaction matters, and enforcement shapes behavior. Competition law intervenes where private incentives to restrict competition diverge from social welfare.
Cartels were analyzed using the same deterrence logic applied in criminal law, emphasizing the role of detection probabilities and sanctions. Information exchange and facilitating practices illustrated how strategic uncertainty disciplines competition and why reducing that uncertainty can be harmful. Market power and dominance were framed in terms of outside options and competitive constraints, linking competition law to bargaining theory and strategic interaction.
Vertical restraints and merger control demonstrated how competition law interacts with contract design and welfare analysis. Efficient contracts and mergers can improve coordination and reduce costs, but they may also harm third parties by weakening competition. Competition law therefore operates in a second-best environment, balancing efficiency gains against risks to the competitive process under uncertainty and institutional limits.
Across all these areas, the same analytical structure reappears: identify incentives, assess strategic effects, and evaluate welfare consequences. Competition law does not seek to eliminate aggressive business behavior, but to preserve the conditions under which competition can function as an effective mechanism for allocating resources and disciplining firms.
Exam
Exam Questions
This chapter explains how exam questions in GRA6296 are structured and how to approach them.
GRA6296 exam questions rarely have a single correct answer. They reward answers that are well structured, grounded in economic reasoning, explicit about assumptions, and clear about what the conclusion depends on. You are not expected to compute optimal numbers or reach definitive verdicts. Instead, you should explain what matters for the answer, why it matters, and how different assumptions would change the conclusion.
The Three Types of Exam Questions
Most exam questions fall into one of three types:
- Legal rules, institutions, and interpretation — evaluating or interpreting legal rules
- Ex ante incentive design (contracts) — designing contractual arrangements
- Private behavior under legal incentives — predicting how actors behave given the law
A useful first step on the exam is to identify the type:
- Is the question evaluating a legal rule or its interpretation? → Type 1
- Is the question about designing or interpreting a contract? → Type 2
- Is the question about how private actors behave given the law? → Type 3
Identifying the type early helps you choose the right structure.
Type 1: Legal Rules, Institutions, and Interpretation
Core question: How do legal rules affect behavior and welfare, and how should they be designed, justified, or interpreted?
Typical questions include:
- "Why is activity X illegal?"
- "Which factors determine whether rule X is efficient?"
- "How should this statute be interpreted using economic reasoning?"
Your task is to compare alternative rules or interpretations by asking how they affect behavior ex ante and whether they lead to better outcomes.
How to Approach Type 1 Questions
The appropriate tool is usually cost–benefit reasoning. You should:
- Be clear about what rule is being considered and what it is compared to.
- Ask how each alternative affects behavior ex ante.
- Identify the main costs and benefits created by these behavioral changes.
- Explain which factors determine whether benefits outweigh costs.
- Draw conditional conclusions, stating what the answer depends on.
For the step-by-step recipe, see A Practical Recipe for Cost–Benefit Analysis. For common mistakes, see Common Pitfalls When Using CBA.
Type 2: Ex Ante Incentive Design (Contracts)
Core question: How should private parties design or interpret the rules governing their relationship to maximize total surplus?
Typical questions include:
- "Should this contractual clause be adopted?"
- "How should risk or liability be allocated?"
- "How should this contract be interpreted given the gap?"
The key insight is that efficient design maximizes total surplus. If a clause increases total surplus, the parties can adjust prices so all are better off. First maximize the pie, then divide it.
How to Approach Type 2 Questions
Analyze how alternative arrangements affect incentives before uncertainty is resolved. The relevant framework focuses on:
- how a clause changes behavior,
- which real costs and benefits are created,
- how information problems affect incentives,
- and how enforcement limits constrain feasible design.
For the contract-design framework, see A Practical Recipe for Contract Clause Analysis. For common mistakes, see Common Pitfalls When Analyzing Contract Clauses.
Type 3: Private Behavior under Legal Incentives
Core question: Given the existing legal environment, how will rational private actors behave?
Typical questions include:
- "Should you trust the investment adviser?"
- "Is the threat of a lawsuit credible?"
- "Which factors determine the size of a settlement?"
Your task is not to evaluate whether the law is good, but to analyze how it shapes incentives, credibility, and bargaining power. Private actors choose strategies by comparing expected payoffs, accounting for enforcement probabilities, sanctions, and litigation costs.
How to Approach Type 3 Questions
The core task is strategic reasoning about how parties behave under legal constraints. You should:
- Identify who is deciding and what options they face.
- Describe the legal environment (liability rules, remedies, enforcement) and treat it as fixed.
- Compare expected payoffs of each option, accounting for probabilities and how others will respond.
- If threats or promises are involved, assess whether they are credible.
- If negotiation is involved, identify outside options and bargaining power.
- Draw conditional conclusions explaining which factors determine the choice.
You need not draw formal game trees, but your reasoning should reflect strategic thinking about actions, responses, and expected outcomes.
What Strong Answers Have in Common
Strong exam answers share these features:
- They directly address what the question asks.
- They explicitly name the economic theory being used and explain why it fits.
- They reason in terms of incentives, trade-offs, and behavioral responses.
- They connect reasoning to concrete case facts, not just abstract principles.
- They make key assumptions explicit and explain how conclusions depend on them.
- They use concrete examples or numerical illustrations where helpful.