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Value Of Information In Competitive Economies With Incomplete Markets

  • PIERO GOTTARDI
  • ROHIT RAHI

We study the value of public information in competitive economies with incomplete markets. We show that generically the welfare effect of a change in the information available prior to trading can be in any direction: There exist changes in information that make all agents better off and changes for which all agents are worse off. In contrast, for any change in information, a Pareto improvement is feasible, that is, attainable by a planner facing the same informational and asset market constraints as agents. In this sense, the response of competitive markets to changes in information is typically not socially optimal.

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File URL: http://hdl.handle.net/10.1111/iere.2014.55.issue-1
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Article provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.

Volume (Year): 55 (2014)
Issue (Month): (02)
Pages: 57-81

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Handle: RePEc:wly:iecrev:v:55:y:2014:i::p:57-81
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  1. Nils H. Hakansson & J. Gregory Kunkel & James A. Ohlson., 1981. "Sufficient and Necessary Conditions for Information to Have Social Value in Pure Exchange," Research Program in Finance Working Papers 122, University of California at Berkeley.
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  17. Eckwert, Bernhard & Zilcha, Itzhak, 2001. "The Value of Information in Production Economies," Journal of Economic Theory, Elsevier, vol. 100(1), pages 172-186, September.
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