The ways financial analysts, traders, and other specialists use information and learn from each other are of fundamental importance to understanding how markets work and prices are set. This graduate-level textbook analyzes how markets aggregate information and examines the impacts of specific market arrangements--or microstructure--on the aggregation process and overall performance of financial markets. Xavier Vives bridges the gap between the two primary views of markets--informational efficiency and herding--and uses a coherent game-theoretic framework to bring together the latest results from the rational expectations and herding literatures. Vives emphasizes the consequences of market interaction and social learning for informational and economic efficiency. He looks closely at information aggregation mechanisms, progressing from simple to complex environments: from static to dynamic models; from competitive to strategic agents; and from simple market strategies such as noncontingent orders or quantities to complex ones like price contingent orders or demand schedules. Vives finds that contending theories like informational efficiency and herding build on the same principles of Bayesian decision making and that "irrational" agents are not needed to explain herding behavior, booms, and crashes. As this book shows, the microstructure of a market is the crucial factor in the informational efficiency of prices. Provides the most complete analysis of the ways markets aggregate information Bridges the gap between the rational expectations and herding literatures Includes exercises with solutions Serves both as a graduate textbook and a resource for researchers, including financial analysts

Written by one of the leading authorities in market microstructure research, this book provides a comprehensive guide to the theoretical work in this important area of finance.

Abstract: Black and Scholes (1973) implied volatilities tend to be systematically related to the option's exercise price and time to expiration. Derman and Kani (1994), Dupire (1994), and Rubinstein (1994) attribute this behavior to the fact that the Black-Scholes constant volatility assumption is violated in practice. These authors hypothesize that the volatility of the underlying asset's return is a deterministic function of the asset price and time and develop the deterministic volatility function (DVF) option valuation model, which has the potential of fitting the observed cross-section of option prices exactly. Using a sample of S & P 500 index options during the period June 1988 through December 1993, we evaluate the economic significance of the implied deterministic volatility function by examining the predictive and hedging performance of the DV option valuation model. We find that its performance is worse than that of an ad hoc Black-Scholes model with variable implied volatilities.

A central concern of economics is how society allocates its resources. Modern economies rely on two institutions to allocate: markets and governments. But how much of the allocating should be performed by markets and how much by governments? This collection of readings will help students appreciate the power of the market. It supplements theoretical explanations of how markets work with concrete examples, addresses questions about whether markets actually work well and offers evidence that supposed "market failures" are not as serious as claimed. Featuring readings from Hayek, William Baumol, Harold Demsetz, Daniel Fischel and Edward Lazear, Benjamin Klein and Keith B. Leffler, Stanley J. Liebowitz and Stephen E. Margolis, and John R. Lott, Jr., this book covers key topics such as: • Why markets are efficient allocators • How markets foster economic growth • Property rights • How markets choose standards • Asymmetric Information • Whether firms abuse their power • Non-excludable goods • Monopolies The selections should be comprehended by undergraduate students who have had an introductory course in economics. This reader can also be used as a supplement for courses in intermediate microeconomics, industrial organization, business and government, law and economics, and public policy.