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Optimal Monetary and Prudential Policies

Author

Listed:
  • Fabrice Collard

    () (University of Bern)

  • Harris Dellas

    () (University of Bern)

  • Behzad Diba

    () (Georgetown University)

  • Olivier Loisel

    () (CREST(ENSAE))

Abstract

The recent financial crisis has highlighted the interconnectedness between macroeconomic and financial stability and has raised the question of whether and how to combine the corresponding main policy instruments (interest rate and bank-capital requirements). This paper offers a characterization of the jointly optimal setting of monetary and prudential policies and discusses its implications for the business cycle. The source of financial fragility is the socially excessive risk-taking by banks due to limited liability and deposit insurance. We characterize the conditions under which locally optimal (Ramsey) policy dedicates the prudential instrument to preventing inefficient risk-taking by banks; and the monetary instrument to dealing with the business cycle, with the two instruments co-varying negatively. Our analysis thus identifies circumstances that can validate the prevailing view among central bankers that standard interest-rate policy cannot serve as the first line of defense against financial instability. In addition, we also provide conditions under which the two instruments might optimally co-move positively and countercyclically.

Suggested Citation

  • Fabrice Collard & Harris Dellas & Behzad Diba & Olivier Loisel, 2012. "Optimal Monetary and Prudential Policies," Working Papers 2012-34, Center for Research in Economics and Statistics.
    • Handle: RePEc:crs:wpaper:2012-34
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    Prudential policy; Capital requirements; Monetary policy; Ramsey-optimal policies;

    JEL classification:

    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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