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Learning about which measure of inflation to target

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  • Luis-Felipe Zanna
  • Marco Airaudo

    ()
    (International Finance Federal Reserve Board)

Abstract

Using a closed economy model with a flexible-price good and a sticky-price good we study the conditions under which interest rate rules induce real determinacy and, more importantly, the MSV solution is learnable in the E-stability sense proposed by Evans and Honkapohja (2001). We show that these conditions depend not only on how aggressively the rule responds to inflation but also on the measure of inflation included in the rule and on whether the flexible-price good and the sticky-price good are Edgeworth complements, substitutes or utility separable. We consider three possible measures of inflation: the flexible-price inflation, the sticky price inflation and the core inflation; and we analyze three different types of rules: a forward-looking rule, a contemporaneous rule and a backward-looking rule. Our results suggest that in order to guarantee a unique equilibrium whose MSV representation is learnable, the government should implement a backward looking rule that responds exclusively to the sticky-price inflation. Forward-looking and contemporaneous rules that respond to either the flexible-price inflation or the core-inflation are more prone to induce multiple equilibria and E-instability of the MSV solution. More importantly backward-looking rules that react to either the flexible-price inflation or the core inflation may guarantee a unique equilibrium but in these cases the fundamental solution (MSV representation) is not learnable in the E-stability sense

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Bibliographic Info

Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2005 with number 176.

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Date of creation: 11 Nov 2005
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Handle: RePEc:sce:scecf5:176

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Keywords: Interest rate rules; Learning; E-stability; multiple equilibria; inflation;

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  1. Clarida, Richard & Gali, Jordi & Gertler, Mark, 1998. "Monetary policy rules in practice Some international evidence," European Economic Review, Elsevier, vol. 42(6), pages 1033-1067, June.
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  17. Luis-Felipe Zanna, 2003. "Interest rate rules and multiple equilibria in the small open economy," International Finance Discussion Papers 785, Board of Governors of the Federal Reserve System (U.S.).
  18. Benhabib, Jess & Schmitt-Grohé, Stephanie & Uribe, Martín, 1999. "Monetary Policy and Multiple Equilibria," CEPR Discussion Papers 2316, C.E.P.R. Discussion Papers.
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