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Public and private learning from prices, strategic substitutability and complementarity, and equilibrium multiplicity

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  • Manzano, Carolina

    (Universitat Rovira i Virgili)

  • Vives, Xavier

    ()
    (IESE Business School)

Abstract

We study a general static noisy rational expectations model, where investors have private information about asset payoffs, with common and private components, and about their own exposure to an aggregate risk factor, and derive conditions for existence and uniqueness (or multiplicity) of equilibria. We find that a main driver of the characterization of equilibria is whether the actions of investors are strategic substitutes or complements. This latter property in turn is driven by the strength of a private learning channel from prices, arising from the multidimensional sources of asymmetric information, in relation to the usual public learning channel. When the private learning channel is strong (weak) in relation to the public we have strong (weak) strategic complementarity in actions and potentially multiple (unique) equilibria. The results enable a precise characterization of whether information acquisition decisions are strategic substitutes or complements. We find that the strategic substitutability in information acquisition result obtained in Grossman and Stiglitz (1980) is robust.

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Bibliographic Info

Paper provided by IESE Business School in its series IESE Research Papers with number D/874.

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Length: 44 pages
Date of creation: 23 Jul 2010
Date of revision:
Handle: RePEc:ebg:iesewp:d-0874

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Postal: IESE Business School, Av Pearson 21, 08034 Barcelona, SPAIN
Web page: http://www.iese.edu/
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Related research

Keywords: Rational expectations equilibrium; strategic complementarity; multiplicity of equilibria; asymmetric information; risk exposure; hedging; supply information;

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References

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  1. Duffie Darrell & Rahi Rohit, 1995. "Financial Market Innovation and Security Design: An Introduction," Journal of Economic Theory, Elsevier, vol. 65(1), pages 1-42, February.
  2. Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-184, University of California at Berkeley.
  3. He, Hua & Wang, Jiang, 1995. "Differential Information and Dynamic Behavior of Stock Trading Volume," Review of Financial Studies, Society for Financial Studies, vol. 8(4), pages 919-72.
  4. Gadi Barlevy & Pietro Veronesi, . "Information Acquisition in Financial Markets," CRSP working papers 484, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
  5. Vives, X., 1990. "How Fast Do Rational Agents Learn?," UFAE and IAE Working Papers 135-90, Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC).
  6. Xavier Vives, 1994. "Short-term Investment and the Informational Efficiency of the Market," CEPR Financial Markets Paper 0034, European Science Foundation Network in Financial Markets, c/o C.E.P.R, 77 Bastwick Street, London EC1V 3PZ.
  7. Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
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  9. Vives, Xavier, 1990. "Nash equilibrium with strategic complementarities," Journal of Mathematical Economics, Elsevier, vol. 19(3), pages 305-321.
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  15. Jayant Vivek Ganguli & Liyan Yang, 2009. "Complementarities, Multiplicity, and Supply Information," Journal of the European Economic Association, MIT Press, vol. 7(1), pages 90-115, 03.
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  23. repec:ebl:ecbull:v:30:y:2010:i:1:p:383-391 is not listed on IDEAS
  24. Christophe Chamley, 2008. "On "Acquisition of Information in Financial Markets"," Review of Economic Studies, Oxford University Press, vol. 75(4), pages 1081-1084.
  25. Itay Goldstein & Emre Ozdenoren & Kathy Yuan, 2011. "Learning and Complementarities in Speculative Attacks," Review of Economic Studies, Oxford University Press, vol. 78(1), pages 263-292.
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Citations

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Cited by:
  1. Chen, Yu-Fu & Funke, Michael, 2010. "Global Warming And Extreme Events: Rethinking The Timing And Intensity Of Environmental Policy," SIRE Discussion Papers 2010-48, Scottish Institute for Research in Economics (SIRE).
  2. Grégoire, Philippe & Huang, Hui, 2012. "Information disclosure with leakages," Economic Modelling, Elsevier, vol. 29(5), pages 2005-2010.
  3. May Elsayyad & Kai A. Konrad, 2011. "Fighting Multiple Tax Havens," Working Papers fighting_multiple_tax_hav, Max Planck Institute for Tax Law and Public Finance.
  4. Cespa, Giovanni & Vives, Xavier, 2007. "Dynamic trading and asset prices: Keynes vs. Hayek," IESE Research Papers D/716, IESE Business School.
  5. Kovalenkov, Alex & Vives, Xavier, 2008. "Competitive Rational Expectations Equilibria Without Apology," CEPR Discussion Papers 7025, C.E.P.R. Discussion Papers.
  6. Jess Benhabib & Pengfei Wang & Yi Wen, 2013. "Uncertainty and Sentiment-Driven Equilibria," NBER Working Papers 18878, National Bureau of Economic Research, Inc.
  7. Biais, Bruno & Foucault, Thierry & Moinas, Sophie, 2013. "Equilibrium Fast Trading," IDEI Working Papers 769, Institut d'Économie Industrielle (IDEI), Toulouse, revised Mar 2014.
  8. Larson, Nathan, 2011. "Clustering on the same news sources in an asset market," MPRA Paper 32823, University Library of Munich, Germany.
  9. Hatchondo, Juan Carlos & Krusell, Per & Schneider, Martin, 2014. "Asset Trading and Valuation with Uncertain Exposure," Working Paper 14-5, Federal Reserve Bank of Richmond.

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