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Examining the New Keynesian Phillips Curve in the U.S.: Why has the relationship between inflation and unemployment weakened?

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  • Haschka, Rouven E.

Abstract

This paper conducts a comprehensive review of the relationship between inflation and unemployment in the U.S. as described by the Phillips curve in a New Keynesian framework and investigates whether this relationship has changed systematically over time. We also aim to identify possible explanations for these changes. Three different hypotheses are discussed to assess whether they are consistent with more recent developments, such as the evolution of inflation expectations, the impact of globalization, and possible nonlinearities in the functional shape of the Phillips curve. We find that the relationship between inflation and unemployment has weakened since the 1980s and especially during the Covid-19 pandemic due to forces of globalization and better anchored inflation expectations resulting from more credible monetary policy. This has led to question of whether the Phillips curve is outdated. We conclude with the implications of these findings for the conduct of monetary policy.

Suggested Citation

  • Haschka, Rouven E., 2024. "Examining the New Keynesian Phillips Curve in the U.S.: Why has the relationship between inflation and unemployment weakened?," Research in Economics, Elsevier, vol. 78(4).
    • Handle: RePEc:eee:reecon:v:78:y:2024:i:4:s1090944324000516
    DOI: 10.1016/j.rie.2024.100987
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    More about this item

    Keywords

    Phillips curve; Inflation; Unemployment; Inflation expectations;
    All these keywords.

    JEL classification:

    • E24 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Employment; Unemployment; Wages; Intergenerational Income Distribution; Aggregate Human Capital; Aggregate Labor Productivity
    • 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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