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The New Keynesian Model and the Long-Run Vertical Phillips Curve: Does It Hold for Germany?


  • Jan Gottschalk
  • Ulrich Fritsche


New-Keynesian macroeconomic models typically assume that any long-run trade-off between inflation and unemployment is ruled out. While this appears to be a reasonable characterization of the US economy, it is less clear that the natural rate hypothesis necessarily holds in a European country like Germany where hysteretic effects may invalidate it. Inspired by the framework developed by Farmer (2000) and Beyer and Farmer (2002), we investigate the long-run relationships between the interest rate, unemployment and inflation in West Germany from the early 1960s up to 2004 using a multivariate co-integration analysis technique. The results point to a structural break in the late 1970s. In the later time period we find for West German data a strong negative correlation between the trend components of inflation and unemployment. We show that this finding contradicts the natural rate hypothesis, introduce a version of the New Keynesian model which allows for some hysteresis and compare the effectiveness of monetary policy in these two models. In general, a policy rule with an aggressive response to a rise in unemployment performs better in a model with hysteretic characteristics than in a model without.

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  • Jan Gottschalk & Ulrich Fritsche, 2005. "The New Keynesian Model and the Long-Run Vertical Phillips Curve: Does It Hold for Germany?," Discussion Papers of DIW Berlin 521, DIW Berlin, German Institute for Economic Research.
  • Handle: RePEc:diw:diwwpp:dp521

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    References listed on IDEAS

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    Cited by:

    1. Ahrens, Steffen & Snower, Dennis J., 2014. "Envy, guilt, and the Phillips curve," Journal of Economic Behavior & Organization, Elsevier, vol. 99(C), pages 69-84.
    2. Ulrich Fritsche & Vladimir Kuzin, 2007. "Unit labor cost growth differentials in the Euro area, Germany, and the US: lessons from PANIC and cluster analysis," Macroeconomics and Finance Series 200703, Hamburg University, Department Wirtschaft und Politik.
    3. Liam Graham & Dennis J. Snower, 2008. "Hyperbolic Discounting and the Phillips Curve," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 40(2-3), pages 427-448, March.
    4. Kitov, Ivan, 2007. "Exact prediction of inflation and unemployment in Germany," MPRA Paper 5088, University Library of Munich, Germany.
    5. Daniel Kienzler & Kai Daniel Schmid, 2013. "Monetary Policy and Hysteresis in Potential Output," IMK Working Paper 116-2013, IMK at the Hans Boeckler Foundation, Macroeconomic Policy Institute.

    More about this item


    Cointegration; Vector error correction model; Unemployment; Phillips curve; Hysteresis;

    JEL classification:

    • B22 - Schools of Economic Thought and Methodology - - History of Economic Thought since 1925 - - - Macroeconomics
    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • E24 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Employment; Unemployment; Wages; Intergenerational Income Distribution; Aggregate Human Capital; Aggregate Labor Productivity

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