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Trend inflation and inflation persistence in the New Keynesian Phillips Curve

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Author Info
Timothy Cogley
Argia M. Sbordone

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Abstract

The New Keynesian Phillips curve (NKPC) asserts that inflation depends on expectations of real marginal costs, but empirical research has shown that purely forward-looking versions of the model generate too little inflation persistence. In this paper, we offer a resolution of the persistence problem. We hypothesize that inflation is highly persistent because of drift in trend inflation, a feature that many versions of the NKPC neglect. We derive a version of the NKPC as a log-linear approximation around a time-varying inflation trend and examine whether it explains deviations of inflation from that trend. We estimate the NKPC parameters jointly with those that define the inflation trend by estimating a vector autoregression with drifting coefficients and volatilities; the autoregressive parameters are constrained to satisfy the restrictions imposed by the NKPC. Our results suggest that trend inflation has been historically quite volatile and that a purely forward-looking model that takes these fluctuations into account approximates well the short-run dynamics of inflation.

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Paper provided by Federal Reserve Bank of New York in its series Staff Reports with number 270.

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Date of creation: 2006
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Handle: RePEc:fip:fednsr:270

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Keywords: Phillips curve ; Inflation (Finance);

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Full references

Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Harashima, Taiji, 2008. "A Microfounded Mechanism of Observed Substantial Inflation Persistence," MPRA Paper 10668, University Library of Munich, Germany. [Downloadable!]
  2. John M. Roberts, 2007. "Learning, Sticky Inflation, and the Sacrifice Ratio," Kiel Working Papers 1365, Kiel Institute for the World Economy. [Downloadable!]
  3. Timothy Cogley & Giorgio E. Primiceri & Thomas J. Sargent, 2008. "Inflation-Gap Persistence in the U.S," NBER Working Papers 13749, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  4. Andreas Hornstein, 2007. "Notes on the inflation dynamics of the New Keynesian Phillips Curve," Working Paper 07-04, Federal Reserve Bank of Richmond. [Downloadable!]
  5. Bernd Fitzenberger & Wolfgang Franz & Oliver Bode, 2007. "The Phillips Curve and NAIRU Revisited: New Estimates for Germany," Kiel Working Papers 1344, Kiel Institute for the World Economy. [Downloadable!]
  6. Jesús Fernández-Villaverde & Juan F Rubio-Ramírez, 2007. "How Structural Are Structural Parameters?," Levine's Bibliography 843644000000000057, UCLA Department of Economics. [Downloadable!]
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  7. Michael T. Kiley, 2008. "Monetary policy actions and long-run inflation expectations," Finance and Economics Discussion Series 2008-03, Board of Governors of the Federal Reserve System (U.S.). [Downloadable!]
  8. Mohamed Boutahar & David Gbaguidi, 2009. "Which Econometric Specification to Characterize the U.S. Inflation Rate Process?," Computational Economics, Springer, vol. 34(2), pages 145-172, September. [Downloadable!] (restricted)
  9. Andrea Vaona, 2008. "Inflation persistence, structural breaks and omitted variables: a critical view," Quaderni della facoltà di Scienze economiche dell'Università di Lugano 0802, Biblioteca universitaria di Lugano (University Library of Lugano). [Downloadable!]
  10. Yilmazkuday, Hakan, 2009. "Is there a Role for International Trade Costs in Explaining the Central Bank Behavior?," MPRA Paper 15951, University Library of Munich, Germany. [Downloadable!]
  11. Andreas Hornstein, 2007. "Evolving inflation dynamics and the New Keynesian Phillips Curve," Economic Quarterly, Federal Reserve Bank of Richmond, issue Fall, pages 317-339. [Downloadable!]
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