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The New Keynesian Phillips Curve and Lagged Inflation: A Case of Spurious Correlation?

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  • Stephen G. Hall

    ()

  • George Hondroyiannis
  • P.A.V.B. Swamy
  • George S. Tavlas

Abstract

The New Keynesian Phillips Curve (NKPC) specifies a relationship between inflation and a forcing variable and the current period’s expectation of future inflation. Most empirical estimates of the NKPC, typically based on Generalized Method of Moments (GMM) estimation, have found a significant role for lagged inflation, producing a “hybrid” NKPC. Using U.S. quarterly data, this paper examines whether the role of lagged inflation in the NKPC might be due to the spurious outcome of specification biases. Like previous investigators, we employ GMM estimation and, like those investigators, we find a significant effect for lagged inflation. We also use time varying-coefficient (TVC) estimation, a procedure that allows us to directly confront specification biases and spurious relationships. Using three separate measures of expected inflation, we find strong support for the view that, under TVC estimation, the coefficient on expected inflation is near unity and that the role of lagged inflation in the NKPC is spurious.

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Paper provided by Department of Economics, University of Leicester in its series Discussion Papers in Economics with number 08/26.

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Date of creation: Aug 2008
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Handle: RePEc:lec:leecon:08/26
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Keywords: New Keynesian Phillips Curve; time-varying coefficients; spurious relationships;

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Find related papers by JEL classification:
  • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
  • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation

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