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Strongly rational expectations equilibria with endogenous acquisition of information

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Author Info
Gabriel Desgranges
Maik Heinemann

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Abstract

This paper analyzes conditions for existence of a strongly rational expectations equilibrium (SREE) in models with private information, where the amount of private information is endogenously determined. It is shown that the conditions for existence of a SREE known from models with exogenously given private information do not change as long as it is impossible to use the information transmitted through market prices. In contrast, these conditions are too weak, when there is such learning from prices. It turns out that the properties of the function which describes the costs that are associated with the individual acquisition of information are important in this respect. In case of constant marginal costs, prices must be half as informative than private signals in order for a SREE to exist. An interpretation of this result that falls back on the famous Grossman-Stiglitz-Paradox is also given.

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Publisher Info
Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2004 with number 35.

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Date of creation: 11 Aug 2004
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Handle: RePEc:sce:scecf4:35

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Related research
Keywords: Eductive Learning Private Information Informational Efficiency Rational Expectations Strongly Rational Expectations Equilibrium

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Find related papers by JEL classification:
D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information
D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search, Learning, and Information
D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

  1. Maik Heinemann, 2003. "Are Rational Expectations Equilibria with Private Information Eductively Stable?," Computing in Economics and Finance 2003 267, Society for Computational Economics. [Downloadable!]
  2. Gabriel Desgranges & Pierre-Yves Geoffard & Roger Guesnerie, 2003. "Do Prices Transmit Rationally Expected Information?," Journal of the European Economic Association, MIT Press, vol. 1(1), pages 124-153, 03. [Downloadable!] (restricted)
  3. Sanford J. Grossman & Joseph E. Stiglitz, 1980. "On the Impossibility of Informationally Efficient Markets," NBER Reprints 0121, National Bureau of Economic Research, Inc.
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  4. R. Guesnerie, 2002. "Anchoring Economic Predictions in Common Knowledge," Econometrica, Econometric Society, vol. 70(2), pages 439-480, March. [Downloadable!] (restricted)
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  5. Maik Heinemann, 2002. "Existence of Strongly Rational Expectations Equilibria on Asset Markets with Asymmetric Information," Computing in Economics and Finance 2002 57, Society for Computational Economics.
  6. Guesnerie, Roger, 1992. "An Exploration of the Eductive Justifications of the Rational-Expectations Hypothesis," American Economic Review, American Economic Association, vol. 82(5), pages 1254-78, December. [Downloadable!] (restricted)
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Ingrid Ott & Susanne Soretz, 2006. "Nachhaltige Entwicklung durch endogeneUmweltwahrnehmung," Working Paper Series in Economics 24, University of Lüneburg, Institute of Economics. [Downloadable!]
  2. Roger Guesnerie, 2008. "Macroeconomic and monetary policies from the "eductive" viewpoint," PSE Working Papers 2008-24, PSE (Ecole normale supérieure). [Downloadable!]
  3. Ingrid Ott & Susanne Soretz, 2006. "Governmental activity and private capital adjustment," Working Paper Series in Economics 26, University of Lüneburg, Institute of Economics. [Downloadable!]
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