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Incomplete Interest Rate Pass-Through and Optimal Monetary Policy


  • Teruyoshi Kobayashi

    (Department of Economics, Chukyo University)


Many recent empirical studies have reported that the passthrough from money-market rates to retail lending rates is far from complete in the euro area. This paper formally shows that when only a fraction of all the loan rates is adjusted in response to a shift in the policy rate, fluctuations in the average loan rate lead to welfare costs. Accordingly, the central bank is required to stabilize the rate of change in the average loan rate in addition to inflation and output. It turns out that the requirement for loan rate stabilization justifies, to some extent, the idea of policy rate smoothing in the face of a productivity shock and/or a preference shock. However, a drastic policy reaction is needed in response to a shock that directly shifts retail loan rates, such as an unexpected shift in the loan rate premium.

Suggested Citation

  • Teruyoshi Kobayashi, 2008. "Incomplete Interest Rate Pass-Through and Optimal Monetary Policy," International Journal of Central Banking, International Journal of Central Banking, vol. 4(3), pages 77-118, September.
  • Handle: RePEc:ijc:ijcjou:y:2008:q:3:a:4

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    References listed on IDEAS

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    More about this item

    JEL classification:

    • 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
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies


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