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Optimal monetary policy in a model of the credit channel

Author

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  • De Fiore, Fiorella
  • Tristani, Oreste
Abstract
We consider a simple extension of the basic new-Keynesian setup in which we relax the assumption of frictionless financial markets. In our economy, asymmetric information and default risk lead banks to optimally charge a lending rate above the risk-free rate. Our contribution is threefold. First, we derive analytically the loglinearised equations which characterise aggregate dynamics in our model and show that they nest those of the new- Keynesian model. A key difference is that marginal costs increase not only with the output gap, but also with the credit spread and the nominal interest rate. Second, we find that financial market imperfections imply that exogenous disturbances, including technology shocks, generate a trade-off between output and inflation stabilisation. Third, we show that, in our model, an aggressive easing of policy is optimal in response to adverse financial market shocks. JEL Classification: E52, E44

Suggested Citation

  • De Fiore, Fiorella & Tristani, Oreste, 2009. "Optimal monetary policy in a model of the credit channel," Working Paper Series 1043, European Central Bank.
    • Handle: RePEc:ecb:ecbwps:20091043
    Note: 24907
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    References listed on IDEAS

    as
    1. Gilchrist, Simon & Leahy, John V., 2002. "Monetary policy and asset prices," Journal of Monetary Economics, Elsevier, vol. 49(1), pages 75-97, January.
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    9. Fiorella De Fiore & Oreste Tristani, 2011. "Credit and the Natural Rate of Interest," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 43(2‐3), pages 407-440, March.
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    More about this item

    Keywords

    asymmetric information; financial markets; optimal monetary policy;
    All these keywords.

    JEL classification:

    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy

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