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Risky Bank Lending and Optimal Capital Adequacy Regulation

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  • Jaromir Benes
  • Michael Kumhof

Abstract

We study the welfare properties of a New Keynesian monetary economy with an essential role for risky bank lending. Banks lend funds deposited by households to a financial accelerator sector, and face penalties for maintaining insufficient net worth. The loan contract specifies an unconditional lending rate, which implies that banks can make loan losses. Their main response is to raise lending rates to rebuild net worth. Prudential rules that adjust minimum capital adequacy requirements in response to loan losses significantly increase welfare. But the gains from eliminating limited liability and moral hazard would be an order of magnitude larger.

Suggested Citation

  • Jaromir Benes & Michael Kumhof, 2011. "Risky Bank Lending and Optimal Capital Adequacy Regulation," IMF Working Papers 11/130, International Monetary Fund.
  • Handle: RePEc:imf:imfwpa:11/130
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    References listed on IDEAS

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    Cited by:

    1. Bailliu, Jeannine & Meh, Cesaire & Zhang, Yahong, 2015. "Macroprudential rules and monetary policy when financial frictions matter," Economic Modelling, Elsevier, vol. 50(C), pages 148-161.
    2. Laurent Clerc & Alexis Derviz & Caterina Mendicino & Stephane Moyen & Kalin Nikolov & Livio Stracca & Javier Suarez & Alexandros P. Vardoulakis, 2015. "Capital Regulation in a Macroeconomic Model with Three Layers of Default," International Journal of Central Banking, International Journal of Central Banking, vol. 11(3), pages 9-63, June.
    3. František Brazdik & Michal Hlavacek & Aleš Marsal, 2012. "Survey of Research on Financial Sector Modeling within DSGE Models: What Central Banks Can Learn from It," Czech Journal of Economics and Finance (Finance a uver), Charles University Prague, Faculty of Social Sciences, vol. 62(3), pages 252-277, July.
    4. Jaromir Benes & Michael Kumhof & Douglas Laxton, 2014. "Financial Crises in DSGE Models; Selected Applications of MAPMOD," IMF Working Papers 14/56, International Monetary Fund.
    5. Leonardo Gambacorta & Sudipto Karmakar, 2016. "Leverage and risk weighted capital requirements," BIS Working Papers 586, Bank for International Settlements.
    6. Konov, Joshua Ioji / JK, 2013. "Enhancing Markets (i.e. Economies) Transmissionability to Optimize Monetary Policies’ Effect," MPRA Paper 46950, University Library of Munich, Germany.
    7. Tayler, William & Zilberman, Roy, 2014. "Macroprudential Regulation and the Role of Monetary Policy," Dynare Working Papers 37, CEPREMAP.
    8. Philipp Engler & Wolfgang Strehl, 2016. "The Macroeconomic Effects of Progressive Taxes and Welfare," Discussion Papers of DIW Berlin 1626, DIW Berlin, German Institute for Economic Research.
    9. Tirupam Goel, 2016. "Banking industry dynamics and size-dependent capital regulation," BIS Working Papers 599, Bank for International Settlements.
    10. repec:eee:jmacro:v:54:y:2017:i:pb:p:187-207 is not listed on IDEAS
    11. Verona, Fabio & Martins, Manuel M.F. & Drumond, Inês, 2017. "Financial shocks, financial stability, and optimal Taylor rules," Journal of Macroeconomics, Elsevier, pages 187-207.
    12. Benes, Jaromir & Kumhof, Michael, 2015. "Risky bank lending and countercyclical capital buffers," Journal of Economic Dynamics and Control, Elsevier, vol. 58(C), pages 58-80.
    13. George J. Bratsiotis & William J. Tayler & Roy Zilberman, 2014. "Financial Regulation, Credit and Liquidity Policy and the Business Cycle," Centre for Growth and Business Cycle Research Discussion Paper Series 196, Economics, The Univeristy of Manchester.

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