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Information Revelation and Market Incompleteness

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  • José M. Marín
  • Rohit Rahi

Abstract

This paper introduces a theory of market incompleteness based on the information transmission role of prices and its adverse impact on the provision of insurance in financial markets. We analyse a simple security design model in which the number and payoff of securities are endogenous. Agents have rational expectations and differ in information, endowments, and attitudes toward risk. When markets are incomplete, equilibrium prices are typically partially revealing, while full relevation is attained with complete markets. The optimality of complete or incomplete markets depends on whether the adverse selection effect (the unwillingness of agents to trade risks when they are informationally disadvantaged) is stronger or weaker than the Hirshleifer effect (the impossibility of trading risks that have already been resolved), as new securities are issued and prices reveal more information. When the Hirshleifer effect dominates, an incomplete set of securities is preferred by all agents, and generates a higher volume of trade.

Suggested Citation

  • José M. Marín & Rohit Rahi, 2000. "Information Revelation and Market Incompleteness," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 67(3), pages 563-579.
    • Handle: RePEc:oup:restud:v:67:y:2000:i:3:p:563-579.
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    File URL: http://hdl.handle.net/10.1111/1467-937X.00144
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    More about this item

    JEL classification:

    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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