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RFS Advance Access published online on June 22, 2006
Review of Financial Studies, doi:10.1093/rfs/hhl010
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© The Author 2006. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Article

Imperfect Competition, Information Heterogeneity, and Financial Contagion

Paolo Pasquariello 1 *
1 Ross School of Business, University of Michigan

* To whom correspondence should be addressed.
Paolo Pasquariello, E-mail: ppasquar{at}bus.umich.edu


  Abstract

This study examines how heterogeneity of private information may induce financial contagion. Using a model of multi-asset trading in which the three main channels of contagion through financial linkages in the literature (correlated information, correlated liquidity, and portfolio rebalancing) are ruled out by construction, we show that financial contagion can still be an equilibrium outcome when speculators receive heterogeneous fundamental information. Risk-neutral speculators trade strategically across many assets to mask their information advantage about one asset. Asymmetric sharing of information among them prevents rational market-makers from learning about their individual signals and trades with suffcient accuracy. Incorrect cross-inference about terminal payoffs and contagion ensue. When used to analyze the transmission of shocks across countries, our model suggests that the process of generation and disclosure of information in emerging markets may explain their vulnerability to financial contagion.

Keywords: Contagion; Excess Comovement; Strategic Trading; Information Heterogeneity.
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