Cambridge Journal of Economics Advance Access originally published online on October 4, 2007
Cambridge Journal of Economics 2008 32(1):49-63; doi:10.1093/cje/bem018
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How useful is the concept of the natural real rate of interest for monetary policy?
* Deutsche Bundesbank
Address for correspondence: Andreas Worms, Deutsche Bundesbank, Economics Department, Wilhelm-Epstein-Strasse 14, 60431 Frankfurt am Main, Germany; email: andreas.worms{at}bundesbank.de
The natural rate of interest plays a key role in Wicksell's cumulative process as well as in modern monetary equilibrium models of the business cycle. It constitutes a useful concept for the theoretical analysis of the interdependence of monetary policy and economic fluctuations. However, the usefulness of this concept for the practice of monetary policy is limited—especially owing to the fact that the natural real rate of interest and its law of motion cannot be measured with satisfying precision.
Key Words: Natural real rate of interest Monetary policy Wicksell
JEL classifications: E31, E32, E52
Manuscript received April 24, 2006; final version received March 5, 2007.