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Moral Hazard in the Diamond-Dybvig Model of Banking

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  • Andolfatto, David
  • Nosal, Ed

Abstract

We modify the Diamond-Dybvig [3] model studied in Green and Lin [5] to incorporate a self-interested banker who has a private record-keeping technology. A public record-keeping device does not exist. We find that there is a trade-off between sophisticated contracts that possess relatively good risk-sharing properties but allocate resources inefficiently for incentive reasons, and simple contracts that possess relatively poor risk-sharing properties but economize on the inefficient use of resources. While this trade-off depends on model parameters, we find that simple contracts prevail under a wide range of empirically plausible parameter values. Although moral hazard in banking may simplify the optimal structure of deposit liabilities, this simple structure does not enhance the prospect of bank runs.

Suggested Citation

  • Andolfatto, David & Nosal, Ed, 2006. "Moral Hazard in the Diamond-Dybvig Model of Banking," MPRA Paper 1337, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:1337
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    References listed on IDEAS

    as
    1. Green, Edward J. & Lin, Ping, 2003. "Implementing efficient allocations in a model of financial intermediation," Journal of Economic Theory, Elsevier, vol. 109(1), pages 1-23, March.
    2. 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.
    3. Douglas W. Diamond, 1984. "Financial Intermediation and Delegated Monitoring," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 51(3), pages 393-414.
    4. James Peck & Karl Shell, 2003. "Bank Portfolio Restrictions and Equilibrium Bank Runs," Levine's Bibliography 666156000000000077, UCLA Department of Economics.
    5. James Peck & Karl Shell, 2003. "Equilibrium Bank Runs," Journal of Political Economy, University of Chicago Press, vol. 111(1), pages 103-123, February.
    6. Calomiris, Charles W & Kahn, Charles M, 1991. "The Role of Demandable Debt in Structuring Optimal Banking Arrangements," American Economic Review, American Economic Association, vol. 81(3), pages 497-513, June.
    7. Neil Wallace, 1988. "Another attempt to explain an illiquid banking system: the Diamond and Dybvig model with sequential service taken seriously," Quarterly Review, Federal Reserve Bank of Minneapolis, vol. 12(Fall), pages 3-16.
    8. Krasa, Stefan & Villamil, Anne P., 1992. "Monitoring the monitor: An incentive structure for a financial intermediary," Journal of Economic Theory, Elsevier, vol. 57(1), pages 197-221.
    9. Andolfatto, David & Nosal, Ed & Wallace, Neil, 2007. "The role of independence in the Green-Lin Diamond-Dybvig model," Journal of Economic Theory, Elsevier, vol. 137(1), pages 709-715, November.
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    More about this item

    Keywords

    Banking; Private record-keeping; Moral hazard; Mechanisms; Bank runs;
    All these keywords.

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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