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Deposit Insurance in General Equilibrium

Author

Listed:
  • Hans Gersbach

    (ETH Zurich, Switzerland)

  • Volker Britz

    (ETH Zurich, Switzerland)

  • Hans Haller

    (Virginia Polytechnic Institute)

Abstract

We study the consequences and optimal design of bank deposit insurance in a general equilibrium model. The model involves two production sectors. One sector is financed by issuing bonds to risk-averse households. Firms in the other sector are monitored and financed by banks. Households fund banks through deposits and equity. Deposits are explicitly insured by a de- posit insurance fund. Any remaining shortfall is implicitly guaranteed by the government. The deposit insurance fund charges banks a premium per unit of deposits whereas the government finances any necessary bail-outs by lump-sum taxation of households. When the deposit insurance premium is actuarially fair or higher than actuarially fair, two types of equilibria emerge: One type of equilibria supports the socially optimal (Arrow-Debreu) allo- cation, and the other type does not. In the latter case, bank lending is too large relative to equity and the probability that the banking system collapses is positive. Next, we show that a judicious combination of deposit insurance and reinsurance eliminates all non-optimal equilibrium allocations.

Suggested Citation

  • Hans Gersbach & Volker Britz & Hans Haller, 2016. "Deposit Insurance in General Equilibrium," CER-ETH Economics working paper series 16/258, CER-ETH - Center of Economic Research (CER-ETH) at ETH Zurich.
    • Handle: RePEc:eth:wpswif:16-258
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    File URL: http://www.cer.ethz.ch/content/dam/ethz/special-interest/mtec/cer-eth/cer-eth-dam/documents/working-papers/WP-16-258.pdf
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    More about this item

    Keywords

    Financial intermediation; deposit insurance; capital structure; general equilibrium; reinsurance;
    All these keywords.

    JEL classification:

    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • G2 - Financial Economics - - Financial Institutions and Services

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