Risk-sharing and the Probability of Crises
AbstractIn this paper I add heterogeneous agents and risk-sharing opportunities to a coordination game which represents deposit withdrawals from the banking system. I find that heterogeneity in risk aversion within the population amplifies the effect of the business cycle on the probability of a bank run. In particular, risk-sharing enhances the likelihood of bank runs during bad times. The novel insight is that when there is a risk-sharing motive, fundamentals drive not only individual behavior, but also which individuals are more relevant for the likelihood of a crisis. This mechanism has important consequences for the way we think about policy questions. In the paper I discuss three such implications in detail: (1) I show that a policy that facilitates access to banking for previously unbanked individuals generates externalities, and may even decrease welfare of the least risk averse group in the population. (2) I characterize the bias in the estimation of the probability of a banking crisis when heterogeneity is neglected. (3) I show how to correctly calculate the social value of deposit insurance when depositors differ in their risk aversion.
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Bibliographic InfoPaper provided by Society for Economic Dynamics in its series 2008 Meeting Papers with number 443.
Date of creation: 2008
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Postal: Society for Economic Dynamics Christian Zimmermann Economic Research Federal Reserve Bank of St. Louis PO Box 442 St. Louis MO 63166-0442 USA
Web page: http://www.EconomicDynamics.org/society.htm
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