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.
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"When and how well do markets aggregate information spread among rational participants? Xavier Vives offers the first unified treatment of all major answers, some from his own recent research, to these important questions. Relying on elementary methods and linear-quadratic models, he succeeds in conveying even to the nonspecialist reader the essence of the most sophisticated results."--Bernard Lebrun, York University
"Thoughtful and persuasive. The book is ambitious in its scope. It will be a reference for PhD-level courses in microeconomics, financial economics, and some parts of industrial organization. This is an important book."--Hyun Song Shin, Princeton UniversityAbout the Author:
Xavier Vives is professor of economics and finance at IESE Business School in Barcelona. He is the author of "Oligopoly Pricing: Old Ideas and New Tools".
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