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Uncertainty Averse Bank Runners

Author

Listed:
  • Guido Cozzi
  • Paolo Giordani

Abstract

In the framework of a Diamond-Dybvig-Peck-Shell banking model, in which a broad class of feasible contractual arrangements is allowed and which admits a run equilibrium, we stress the assumption that depositors are uncertain of their position in the queue when expecting a run. The formalization of the depositor's attitude towards this form of uncertainty is inspired by the multiple prior maxmin expected utility (MEU) theory axiomatized by Gilboa and Schmeidler (1989). We prove that there exists a positive measure set of subjective prior beliefs, obtained from the minimization over the set of admissible priors, for which the bank run equilibrium disappears. The implication is that `suspension schemes' are valuable since, in addition to the improvement in risk-sharing among agents (Wallace (1990)), they may undermine panic-driven bank runs.

Suggested Citation

  • Guido Cozzi & Paolo Giordani, 2004. "Uncertainty Averse Bank Runners," Working Papers in Public Economics 71, Department of Economics and Law, Sapienza University of Rome.
    • Handle: RePEc:sap:wpaper:wp71
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    References listed on IDEAS

    as
    1. Daniel Ellsberg, 2000. "Risk, Ambiguity and the Savage Axioms," Levine's Working Paper Archive 7605, David K. Levine.
    2. Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
    3. Douglas W. Diamond & Philip H. Dybvig, 2000. "Bank runs, deposit insurance, and liquidity," Quarterly Review, Federal Reserve Bank of Minneapolis, vol. 24(Win), pages 14-23.
    4. James Peck & Karl Shell, 2003. "Equilibrium Bank Runs," Journal of Political Economy, University of Chicago Press, vol. 111(1), pages 103-123, February.
    5. Edward J. Green & Ping Lin, 2000. "Diamond and Dybvig's classic theory of financial intermediation : what's missing?," Quarterly Review, Federal Reserve Bank of Minneapolis, vol. 24(Win), pages 3-13.
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    Keywords

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    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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