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Optimal monetary policy under low trend inflation

Author

Listed:
  • Guido Ascari

    (University of Pavia)

  • Tiziano Ropele

    (Bank of Italy)

Abstract

In the monetary policy literature it is commonly assumed that trend inflation is zero, despite overwhelming evidence that zero inflation is neither empirically relevant nor a practical objective for central bank policy. We therefore extend the standard New Keynesian model to allow for positive trend inflation, showing that even low trend inflation has strong effects on optimal monetary policy and the dynamics of inflation, output, and interest rates. Under discretion, the efficient policy deteriorates and there is no guarantee of determinacy. Even with commitment, targeting non-zero trend inflation leads to substantial welfare losses. Our results serve as a warning against indiscriminate use of models assuming zero trend inflation.

Suggested Citation

  • Guido Ascari & Tiziano Ropele, 2007. "Optimal monetary policy under low trend inflation," Temi di discussione (Economic working papers) 647, Bank of Italy, Economic Research and International Relations Area.
    • Handle: RePEc:bdi:wptemi:td_647_07
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    References listed on IDEAS

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    More about this item

    Keywords

    Optimal monetary policy; trend inflation;

    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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