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Learning about which measure of inflation to target

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Author Info
Luis-Felipe Zanna
Marco Airaudo () (International Finance Federal Reserve Board)

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

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Find related papers by JEL classification:
E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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    Other versions:
  3. Charles T. Carlstrom & Timothy S. Fuerst & Fabio Ghironi, 2002. "Does It Matter (for Equilibrium Determinacy) What Price Index the Central Bank Targets?," Boston College Working Papers in Economics 533, Boston College Department of Economics, revised 07 Feb 2003. [Downloadable!]
    Other versions:
  4. James Bullard & Kaushik Mitra, 2002. "Learning about monetary policy rules," Working Papers 2000-001, Federal Reserve Bank of St. Louis. [Downloadable!]
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  5. Bernanke, Ben S & Woodford, Michael, 1997. "Inflation Forecasts and Monetary Policy," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 29(4), pages 653-84, November.
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  6. Jordi Galí & Tommaso Monacelli, 2004. "Monetary Policy and Exchange Rate Volatility in a Small Open Economy," Economics Working Papers 835, Department of Economics and Business, Universitat Pompeu Fabra. [Downloadable!]
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  7. Gregory Mankiw & Ricardo Reis, 2002. "What measure of inflation should a central bank target?," Working Paper Series 170, European Central Bank. [Downloadable!]
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  8. Aoki, Kosuke, 2001. "Optimal monetary policy responses to relative-price changes," Journal of Monetary Economics, Elsevier, vol. 48(1), pages 55-80, August. [Downloadable!] (restricted)
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  13. Jess Benhabib & Stephanie Schmitt-Grohe & Martin Uribe, 2001. "Monetary Policy and Multiple Equilibria," American Economic Review, American Economic Association, vol. 91(1), pages 167-186, March. [Downloadable!] (restricted)
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  14. Taylor, John B., 1993. "Discretion versus policy rules in practice," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 39(1), pages 195-214, December. [Downloadable!] (restricted)
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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.). [Downloadable!]
  18. Evans, George W. & Honkapohja, Seppo, 1999. "Learning dynamics," Handbook of Macroeconomics, in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 7, pages 449-542 Elsevier. [Downloadable!] (restricted)
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  22. Rotemberg, Julio J, 1982. "Sticky Prices in the United States," Journal of Political Economy, University of Chicago Press, vol. 90(6), pages 1187-1211, December. [Downloadable!] (restricted)
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