Hal Varian, in the course of a long and distinguished career, has made a seminal contribution to many branches of economics. His pathbreaking work on the development of economic theory, finance, industrial organization and econometrics is represented in this important new collection of key articles published over the last twenty years.

Contents: Introduction 1. Biographical Reflections • Equity 2. Equity, Envy, and Efficiency 3. Two Problems in the Theory of Fairness • Dynamics 4. Catastrophe Theory and the Business Cycle 5. Non-Walrasian Equilibria 6. Boundary Restrictions in the Global Newton Method • Revealed Preference 7. The Nonparametric Approach to Demand Analysis 8. The Nonparametric Approach to Production Analysis • Econometrics 9. A Bayesian Approach to Real Estate Assessment 10. Nonparametric Analysis of Optimizing Behavior 11. Goodness-of-Fit in Optimizing Models • Industrial Organization 12. A Model of Sales 13. Price Discrimination and Social Welfare • Finance 14. Divergence of Opinion in Complete Markets: A Note 15. Differences of Opinion and the Volume of Trade 16. Estimating Risk Aversion from Portfolio Choice • Public Goods 17. Sequential Contributions to Public Goods 18. A Solution to the Problem of Externalities • Information Technology 19. Economic Incentives in Software Design 20. Pricing Congestible Network Resources • Methodology 21. What Use is Economic Theory? 22. How to Build an Economic Model in Your Spare Time Index