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The Delphic forward guidance puzzle in New Keynesian models

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  • Fujiwara, Ippei
  • Waki, Yuichiro

Abstract

When the central bank has information that can help the private sector better predict the future, should it communicate such information to the public? In purely forward-looking New Keynesian models, such Delphic forward guidance unambiguously reduces ex ante welfare by increasing the variability of inflation and the output gap. We call this phenomenon the Delphic forward guidance puzzle. In more elaborate models with endogenous state variables, a combination of Delphic forward guidance and preemptive policy actions may improve welfare. However, full information revelation is generally not optimal and what information needs to be revealed is highly model-dependent.

Suggested Citation

  • Fujiwara, Ippei & Waki, Yuichiro, 2021. "The Delphic forward guidance puzzle in New Keynesian models," CEPR Discussion Papers 16020, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:16020
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    Cited by:

    1. is not listed on IDEAS
    2. Xin Xu & Xiaoguang Xu, 2023. "Forward guidance investigation in new Keynesian models," Economic Research-Ekonomska Istraživanja, Taylor & Francis Journals, vol. 36(2), pages 2145983-214, July.
    3. Antoine Camous & Dmitry Matveev, 2025. "Monetary Stabilization of a Multi-Sector Economy: Adding Words to Action?," Working papers 1013, Banque de France.

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    Keywords

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    JEL classification:

    • E30 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - General (includes Measurement and Data)
    • E40 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - General
    • E50 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - General

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