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Bank of Finland Research Discussion Papers, Bank of Finland

No 20/2005:
Robust monetary policy in a small open economy

Kai Leitemo () and Ulf Söderström ()

Abstract: This paper studies how a central bank’s preference for robustness against model misspecification affects the design of monetary policy in a New-Keynesian model of a small open economy. Due to the simple model structure, we are able to solve analytically solve the optimal robust policy rule, and separately ana-lyze the effects of robustness against misspecification concerning the determination of inflation, output and the exchange rate. We show that an increased central bank preference for robustness makes monetary policy respond more aggressively or more cautiously to shocks, depending on the type of shock and the source of misspecification.

Keywords: Knightian uncertainty; model uncertainty; robust control; min-max policies; (follow links to similar papers)

JEL-Codes: E52; E58; F41; (follow links to similar papers)

58 pages, October 11, 2005

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