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Endogenous Private Information Structures

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  • Sjaak Hurkens

    (Universitat Pompeu Fabra)

  • Nir Vulkan

    (Universitat Pompeu Fabra)

Abstract

Many models in the economics literature deal with strategic situations with privately informed agents. In those models the information structure is assumed to be exogenous and common knowledge. In many applications information gathering is one of the strategic options available to agents. We formally incorporate this option into the game and the information structure will arise endogenously. We ask whether models with exogenous information structures, and the results they provide, are robust with respect to this endogenization. We show that any Nash equilibrium of the game with information acquisition induces a Nash equilibrium in the corresponding game with an exogenous structure. The same is not always true when `Nash equilibrium' is replaced by `sequential equilibrium' but we provide sufficient conditions on the structure of the game for which this is true. Moreover, we characterize the (sequential) Nash equilibria of games with an exogenous information structure that can arise as a (sequential) Nash equilibrium of a game with endogenous information acquisition,

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Bibliographic Info

Paper provided by Econometric Society in its series Econometric Society World Congress 2000 Contributed Papers with number 0613.

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Date of creation: 01 Aug 2000
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Handle: RePEc:ecm:wc2000:0613

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References

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  1. Cremer, Jacques & Khalil, Fahad, 1992. "Gathering Information before Signing a Contract," American Economic Review, American Economic Association, vol. 82(3), pages 566-78, June.
  2. Vives, Xavier, 1988. "Aggregation of Information in Large Cournot Markets," Econometrica, Econometric Society, vol. 56(4), pages 851-76, July.
  3. Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
  4. Hurkens, Sjaak & Vulkan, Nir, 2001. "Information acquisition and entry," Journal of Economic Behavior & Organization, Elsevier, vol. 44(4), pages 467-479, April.
  5. Jean-Pierre Ponssard, 1979. "The Strategic Role of Information on the Demand Function in an Oligopolistic Market," Management Science, INFORMS, vol. 25(3), pages 243-250, March.
  6. Khalil, F & Rochet, J-C, 1997. "Strategic Information Gathering Before a Contract is Offered," Discussion Papers in Economics at the University of Washington 97-15, Department of Economics at the University of Washington.
  7. Anke Kessler, 1998. "The Value of Ignorance," RAND Journal of Economics, The RAND Corporation, vol. 29(2), pages 339-354, Summer.
  8. Neyman, Abraham, 1991. "The positive value of information," Games and Economic Behavior, Elsevier, vol. 3(3), pages 350-355, August.
  9. Hwang, Hae-shin, 1995. "Information Acquisition and Relative Efficiency of Competitive, Oligopoly and Monopoly Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 36(2), pages 325-40, May.
  10. Milgrom, Paul R, 1981. "Rational Expectations, Information Acquisition, and Competitive Bidding," Econometrica, Econometric Society, vol. 49(4), pages 921-43, June.
  11. Nicola Persico, 2000. "Information Acquisition in Auctions," Econometrica, Econometric Society, vol. 68(1), pages 135-148, January.
  12. Esther Hauk & Sjaak Hurkens, 1996. "Secret information acquisition in Cournot markets," Economics Working Papers 233, Department of Economics and Business, Universitat Pompeu Fabra, revised Aug 1997.
  13. Li, Lode & McKelvey, Richard D. & Page, Talbot, 1987. "Optimal research for cournot oligopolists," Journal of Economic Theory, Elsevier, vol. 42(1), pages 140-166, June.
  14. Hurkens, Sjaak & Vulkan, Nir, 2003. "Free entry does not imply zero profits," Economics Letters, Elsevier, vol. 81(3), pages 285-290, December.
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Cited by:
  1. Anders Poulsen & Michael Roos, 2010. "Do People Make Strategic Commitments? Experimental Evidence on Strategic Information Avoidance," University of East Anglia Applied and Financial Economics Working Paper Series 007, School of Economics, University of East Anglia, Norwich, UK..
  2. Poulsen, Anders, 2007. "Learning to Make Strategic Moves: Experimental Evidence," MPRA Paper 10927, University Library of Munich, Germany.
  3. Anders U. Poulsen & Michael V. M. Roos, 2009. "Do People Make Strategic Moves? Experimental Evidence on Strategic Information Avoidance," Discussion Papers 09-06, University of Copenhagen. Department of Economics.

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