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Bank Size and Risk-Taking under Basel II

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  • Hakenes, Hendrik
  • Schnabel, Isabel

Abstract

We analyze the relationship between bank size and risk-taking under the New Basel Capital Accord. Using a model with imperfect competition and moral hazard, we show that the introduction of an internal ratings based (IRB) approach improves upon flat capital requirements if the approach is applied uniformly across banks and if the costs of implementation are not too high. However, the banks’ right to choose between the standardized and the IRB approaches under Basel II gives larger banks a competitive advantage and, due to fiercer competition, pushes smaller banks to take higher risks. This may even lead to higher aggregate risk-taking.

Suggested Citation

  • Hakenes, Hendrik & Schnabel, Isabel, 2006. "Bank Size and Risk-Taking under Basel II," Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems 88, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
    • Handle: RePEc:trf:wpaper:88
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    More about this item

    Keywords

    Basel II; IRB approach; bank competition; capital requirements; SME financing;
    All these keywords.

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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