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ROBUST MONETARY POLICY IN A NEW KEYNESIAN MODEL WITH IMPERFECT INTEREST RATE PASS-THROUGH

Published online by Cambridge University Press:  29 October 2015

Rafael Gerke  and
Felix Hammermann
Rafael Gerke
Affiliation:
Deutsche Bundesbank
Felix Hammermann*
Affiliation:
Deutsche Bundesbank
*
Address correspondence to: Felix Hammermann, Economics Department, Deutsche Bundesbank, Wilhelm-Epstein-Strasse 14, 60431 Frankfurt, Germany; e-mail: felix.hammermann@bundesbank.de.
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Abstract

We use robust control to study how a central bank in an economy with imperfect interest rate pass-through conducts monetary policy if it fears that its model could be misspecified. We find that, first, whether robust optimal monetary policy under commitment responds more cautiously or more aggressively depends crucially on the source of shock. Imperfect pass-through amplifies the robust policy. Second, if the central bank is concerned about uncertainty, it dampens volatility in the inflation rate preemptively but accepts higher volatility in the output gap and loan rate. However, for highly sticky loan rates, insurance against model misspecification becomes particularly pricy. Third, if the central bank fears uncertainty only in the IS equation or the loan rate equation, the robust policy shifts its concern for stabilization away from inflation.

Keywords

Optimal Monetary PolicyCommitmentModel Uncertainty
Type
Articles
Information
Macroeconomic Dynamics , Volume 20 , Issue 6 , September 2016 , pp. 1504 - 1526
Copyright
Copyright © Cambridge University Press 2015 

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