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Speculative Attacks with Multiple Sources of Public Information

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  • Frank Heinemann
  • Camille Cornand

Abstract

We propose a speculative attack model in which agents receive multiple public signals. It is characterised by its focus on an informational structure, which sets free from the strict separation between public information and private information. Diverse pieces of public information can be taken into account differently by players and are likely to lead to different appreciations ex post. This process defines players’ private value. The main result is to show that equilibrium uniqueness depends on two conditions: (i) signals are sufficiently dispersed (ii) private beliefs about the relative precision of these signals sufficiently differ. We derive some implications for information dissemination policy. Transparency in this context is multi-dimensional: it concerns the publicity of announcements, the number of signals disclosed as well as their precision. Especially, it seems that the central bank has better not publishing its forecast errors in order to maintain stability. An illustration to our analysis is the recent debate concerning the optimal monetary policy committee structure of central banks. Keywords: Speculative attack – coordination game – multiple equilibria – public and private information – transparency. JEL Classification: F31 – D82.

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Bibliographic Info

Paper provided by Financial Markets Group in its series FMG Discussion Papers with number dp570.

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Date of creation: Jun 2006
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Handle: RePEc:fmg:fmgdps:dp570

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Web page: http://www.lse.ac.uk/fmg/

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  1. Stephen Morris & Hyun Song Shin, 2000. "Global Games: Theory and Applications," Cowles Foundation Discussion Papers 1275, Cowles Foundation for Research in Economics, Yale University.
  2. Christina E. Bannier, 2003. "Private and Public Information in Self-Fulfilling Currency Crises," International Finance 0309006, EconWPA.
  3. Maurice Obstfeld, 1995. "Models of Currency Crises with Self-Fulfilling Features," NBER Working Papers 5285, National Bureau of Economic Research, Inc.
  4. Obstfeld, Maurice, 1986. "Rational and Self-fulfilling Balance-of-Payments Crises," American Economic Review, American Economic Association, vol. 76(1), pages 72-81, March.
  5. Blinder, Alan S & Morgan, John, 2005. "Are Two Heads Better than One? Monetary Policy by Committee," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 37(5), pages 789-811, October.
  6. Morris, S & Song Shin, H, 1996. "Unique Equilibrium in a Model of Self-Fulfilling Currency Attacks," Economics Papers 126, Economics Group, Nuffield College, University of Oxford.
  7. Heinemann, Frank & Illing, Gerhard, 2002. "Speculative attacks: Unique equilibrium and transparency," Munich Reprints in Economics 19430, University of Munich, Department of Economics.
  8. Hellwig, Christian, 2002. "Public Information, Private Information, and the Multiplicity of Equilibria in Coordination Games," Journal of Economic Theory, Elsevier, vol. 107(2), pages 191-222, December.
  9. Axel Lindner, 2003. "Does Transparency of Central Banks Produce Multiple Equilibria on Currency Markets?," IWH Discussion Papers 178, Halle Institute for Economic Research.
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Cited by:
  1. Jean-Pierre Allegret & Camille Cornand, 2006. "The pros and cons of higher transparency: the case of speculative attacks," Recherches économiques de Louvain, De Boeck Université, vol. 72(3), pages 215-246.
  2. Tijmen Daniëls & Henk Jager & Franc Klaassen, 2009. "Defending Against Speculative Attacks," SFB 649 Discussion Papers SFB649DP2009-011, Sonderforschungsbereich 649, Humboldt University, Berlin, Germany.
  3. repec:hal:cesptp:halshs-00177058 is not listed on IDEAS

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