14.03 | Fall 2025 | Undergraduate, Graduate

Microeconomic Theory and Public Policy

Calendar

Part I. Themes: Theory, Causal Tests, Evidence and a First Application

1. The Consequences of Minimum Wage Laws for Earnings and Employment

  • What is 14.03/14.003 about?
  • Application: minimum wages and employment—theory and evidence
    • Minimum wage and employment in the standard competitive model
    • Minimum wage and employment in monopsony model
    • How can we empirically distinguish these cases?

2. Testing Theory: The Fundamental Problem of Causal Evidence

  • The fundamental problem of causal inference (FPCI)
    • The Rubin causal model (RCM)
    • Experiments and the RCM
    • Quasi-experiments in economics
  • The method of difference-in-differences (DD)

Part II. The Foundation of Economic Theory: Consumer Preference, Choice, Optimization and Demand

3. Introducing Consumer Theory: The Foundation of Microeconomics (and Minimum Wage Wrap-Up)

  • Minimum wage wrap-up
  • The axioms of consumer theory
    • Existence of a utility function
    • Properties of utility functions
    • Cardinality versus ordinality
    • Monotone transformations

4–5. Consumer Sovereignty: The Carte Blanche Principle and Health Insurance Demand

  • Utility maximization and constrained optimization
  • The indirect utility function
  • Expenditure minimization and the expenditure function
  • Relationship between expenditure and indirect utility functions
  • Applications of consumer theory
  • The regression discontinuity method

6. From Preferences to Demand Curves

  • Where demand curves come from
  • Uncompensated (“Marshallian”) demand
  • Compensated (“Hicksian”) demand
  • Relationship between indirect utility function, expenditure function, and demand functions

7. Income Effects, Substitution Effects, and the Design of Anti-Poverty Programs

  • Normal, inferior, and Giffen goods
  • Incentivizing work: labor supply and the Earned Income Tax Credit

8. Income, Substitution, and Subsistence

  • Connecting compensated and uncompensated demand curves: the Slutsky equation
  • Testing the theory: rice and noodle subsidies in China

9. Consumer Theory Wrap-Up

Exam #1

10. Applied Competitive Analysis: The Incidence of a Tax

  • Aggregating individual to market demands
  • Producer and consumer surplus in competitive equilibrium
  • Distinguishing deadweight losses from transfers
  • Application: tax incidence

11. Applied Competitive Analysis: Free Entry in a Cartelized Market

  • Applied competitive analysis

12. Putting Markets Together: The Edgeworth Box

  • General equilibrium in a pure exchange economy: the Edgeworth box
    • Contract curves
    • Gains from trade between consumers
    • The fundamental welfare theorems

13. The Gains from Market Integration: “The Digital Provide”

  • The principle of arbitrage

14.International Trade and Comparative Advantage

  • Why do countries gain from trade?
  • The principle of comparative advantage
  • Where does comparative advantage come from?
  • Example: the RA problem

15. Does Trade Raise National Income? 

  • How do we even test this question?
  • The method of instrumental variables (IV) [also known as two stage least squares, 2SLS]

16. The Free Trade Dilemma

  • Why trade is not Pareto-improving
  • Redistributive effects of trade: evidence

Part IV. Market Failures: Externalities, Risk, and Moral Hazard and Adverse Selection

17. Externalities: Definition, Consequences, and Remedies

  • Externalities: definition, consequences and remedies
  • The problem of social cost: the Coase theorem

Exam #2

18. Risk and Safety Regulation: Hockey Helmets, etc.

19. Adverse Selection

20. Adverse Selection, Moral Hazard, and Subprime Lending

  • Application: moral hazard, securitization, and subprime lending

Part V. Prediction, Learning, Decision, and Discrimination

21. Discrimination in Labor Markets: Banning the Box

  • Statistical discrimination: definition and logic
  • Discrimination, prejudice, and “ban the box” regulations

23. Prediction, Machine Learning, and Decision-Making

  • End of life care: doctors versus algorithms
  • Algorithmic discrimination

24. Artificial Intelligence, Discrimination, and Competition in Housing Markets

  • The surprising consequences of algorithmic decision-making for market competition and housing       
    discrimination

Course Info

Fall 2025
Exam Solutions
Exams
Lecture Notes
Problem Set Solutions
Problem Sets
Readings