On Price-Taking Behavior in Asymmetric Information Economies
AbstractIt is understood that rational expectations equilibria may not be incentive compatible: agents with private information may be able to affect prices through the information conveyed by their market behavior. We present a simple general equilibrium model to illustrate the connection between the notion of informational size presented in McLean and Postlewaite (2002) and the incentive properties of market equilibria. Specifically, we show that fully revealing market equilibria are not incentive compatible for an economy with few privately informed producers because of the producers’ informational size, but that replicating the economy decreases agents’ informational size. For sufficiently large economies, there exists an incentive compatible fully revealing market equilibrium.
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Bibliographic InfoPaper provided by Penn Institute for Economic Research, Department of Economics, University of Pennsylvania in its series PIER Working Paper Archive with number 04-040.
Length: 18 pages
Date of creation: 04 Jun 2004
Date of revision:
Rational Expectations Equilibria; Informational Smallness;
Find related papers by JEL classification:
- D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
- D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
This paper has been announced in the following NEP Reports:
- NEP-ALL-2005-01-02 (All new papers)
- NEP-COM-2005-01-02 (Industrial Competition)
- NEP-MIC-2005-01-02 (Microeconomics)
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