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Complementarities in Information Acquisition with Short-Term Trades

  • Christophe Chamley

    ()

    (Department of Economics, Boston University)

Registered author(s):

    In a financial market where agents trade for prices in the short-term and where news can increase the uncertainty of the public belief, there are strategic complementarities in the acquisition of private information and a continuum of equilibrium strategies if the cost of information is sufficient small. Imperfect observation of the past prices reduces the continuum of Nash-equilibrium to a unique one which may be a Strongly Rational-Expectations Equilibrium. In that equilibrium, because of the strategic complementarity, there are two sharply different regimes for the evolution of the price, the volume of trade and the information acquisition which is either nil or at its maximum.

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    Paper provided by Boston University - Department of Economics in its series Boston University - Department of Economics - Working Papers Series with number WP2005-027.

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    Length: 37 pages
    Date of creation: Jul 2005
    Date of revision:
    Handle: RePEc:bos:wpaper:wp2005-027
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    1. 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.
    2. Cooper, Russell & John, Andrew, 1988. "Coordinating Coordination Failures in Keynesian Models," The Quarterly Journal of Economics, MIT Press, vol. 103(3), pages 441-63, August.
    3. David, Alexander, 1997. "Fluctuating Confidence in Stock Markets: Implications for Returns and Volatility," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 32(04), pages 427-462, December.
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    5. Hirshleifer, David & Teoh, Siew Hong, 2001. "Herd Behavior and Cascading in Capital Markets: A Review and Synthesis," MPRA Paper 5186, University Library of Munich, Germany.
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    7. Carlsson, H. & Van Damme, E., 1990. "Global Games And Equilibrium Selection," Papers 9052, Tilburg - Center for Economic Research.
    8. Décamps, Jean-Paul & Lovo, Stefano, 2003. "Risk Aversion and Herd Behavior in Financial Markets," IDEI Working Papers 246, Institut d'Économie Industrielle (IDEI), Toulouse.
    9. Maria Grazia Romano, 2004. "Learning, Cascades and Transaction Costs," CSEF Working Papers 123, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy, revised 01 Feb 2006.
    10. Glosten, Lawrence R. & Milgrom, Paul R., 1985. "Bid, ask and transaction prices in a specialist market with heterogeneously informed traders," Journal of Financial Economics, Elsevier, vol. 14(1), pages 71-100, March.
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    13. Bikhchandani, Sushil & Hirshleifer, David & Welch, Ivo, 1992. "A Theory of Fads, Fashion, Custom, and Cultural Change in Informational Cascades," Journal of Political Economy, University of Chicago Press, vol. 100(5), pages 992-1026, October.
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    15. Avery, Christopher & Zemsky, Peter, 1998. "Multidimensional Uncertainty and Herd Behavior in Financial Markets," American Economic Review, American Economic Association, vol. 88(4), pages 724-48, September.
    16. Guesnerie, R., 1999. "Anchoring Economic Predictions in Common Knowledge," DELTA Working Papers 1999-06, DELTA (Ecole normale supérieure).
    17. James Dow, 2004. "Is Liquidity Self-Fulfilling?," The Journal of Business, University of Chicago Press, vol. 77(4), pages 895-908, October.
    18. Detemple, Jerome B., 1991. "Further results on asset pricing with incomplete information," Journal of Economic Dynamics and Control, Elsevier, vol. 15(3), pages 425-453, July.
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