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Privileged information exacerbates market volatility

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Abstract

We study how asymmetric information affects market volatility in a linear setup where the outcome is determined by forecasts about this same outcome. The unique rational expectations equilibrium will be stable when it is the only rationalizable solution. It has been established in the literature that stability is obtained when the sensitivity of the outcome to agents' forecasts is less than 1, provided that this sensitivity is common knowledge. Relaxing this common knowledge assumption, instability is obtained when the proportion of agents who a priori know the sensitivity is large, and the uninformed agents believe it is possible that the sensitivity is greater than 1.

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File URL: ftp://mse.univ-paris1.fr/pub/mse/CES2011/11061.pdf
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Paper provided by Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne in its series Documents de travail du Centre d'Economie de la Sorbonne with number 11061.

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Length: 35 pages
Date of creation: Oct 2011
Date of revision:
Handle: RePEc:mse:cesdoc:11061

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Keywords: Asymmetric information; common knowledge; eductive learning; rational expectations; rationalizability; volatility.;

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  1. DeGennaro, Ramon P. & Shrieves, Ronald E., 1997. "Public information releases, private information arrival and volatility in the foreign exchange market," Journal of Empirical Finance, Elsevier, vol. 4(4), pages 295-315, December.
  2. Nir Jaimovich & Sergio Rebelo, 2006. "Can News About the Future Drive the Business Cycle?," NBER Working Papers 12537, National Bureau of Economic Research, Inc.
  3. Nimark, Kristoffer, 2008. "Dynamic pricing and imperfect common knowledge," Journal of Monetary Economics, Elsevier, vol. 55(2), pages 365-382, March.
  4. Stephen Morris & Hyun Song Shin, 2002. "Social Value of Public Information," American Economic Review, American Economic Association, vol. 92(5), pages 1521-1534, December.
  5. David-Jan Jansen & Jakob de Haan, 2005. "Were Verbal Efforts to Support the Euro Effective? A High-Frequency Analysis of ECB Statements," DNB Working Papers 033, Netherlands Central Bank, Research Department.
  6. GRANDMONT, Jean-Michel, 1997. "Expectations formation and stability of large socioeconomic systems," CORE Discussion Papers 1997088, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  7. Pearce, David G, 1984. "Rationalizable Strategic Behavior and the Problem of Perfection," Econometrica, Econometric Society, vol. 52(4), pages 1029-50, July.
  8. Christian Hellwig, . "Monetary Business Cycle Models: Imperfect Information (Review Article, March 2006)," UCLA Economics Online Papers 377, UCLA Department of Economics.
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