Abstract
Across 14 developed-economy countries over the past half-century, the authors analyze the behavior of inflation once a country’s inflation rate surges past various thresholds and study how long a burst of inflation typically lingers. If history is a guide, inflation can take far longer to return to normal levels than most people realize. <i>Transitory</i> inflation is certainly possible, but it is hardly a sensible central expectation. Messaging and policy response from the US Federal Reserve Bank should reflect the relatively high empirical risk that inflation may persist.
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