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What is the optimal inflation rate?

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  • Roberto M. Billi
  • George A. Kahn

Abstract

With inflation in the United States and elsewhere low by historical standards, the question of what inflation rate policymakers should aim for has moved front and center. Knowing what inflation rate to aim for is critically important for maximizing the economic well-being of the public. ; Most policymakers agree they should not allow inflation to fall below zero because the costs of deflation are thought to be high. They disagree, however, about how much above zero, if any, central banks should aim to keep inflation. Unfortunately, rigorous estimates of an \\"optimal inflation rate\\" have not been available in the economics literature. ; Billi and Kahn provide estimates of the optimal inflation rate. Based on a standard, modern macroeconomic model calibrated to U.S. data, they estimate the optimal inflation rate to be 0.7 to 1.4 percent per year as measured by the PCE price index. This estimate is the first to be based on an economic model in which policymakers are assumed explicitly to maximize the economic well-being of the public. Further research is required to confirm or refine these results using models that incorporate a richer array of possible interactions between the long-run inflation objective and economic stability.

Suggested Citation

  • Roberto M. Billi & George A. Kahn, 2008. "What is the optimal inflation rate?," Economic Review, Federal Reserve Bank of Kansas City, vol. 93(Q II), pages 5-28.
    • Handle: RePEc:fip:fedker:y:2008:i:qii:p:5-28:n:v.93no.2
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