Inflation and Activity: Two Explorations and Their Monetary Policy Implications

Olivier Blanchard (PIIE) and Lawrence H. Summers (Harvard University)
Working Paper
November 2015

Blanchard, Cerutti, and Summers explore two issues triggered by the global financial crisis. First, in most advanced countries, output remains far below the prerecession trend, suggesting hysteresis. The authors look at 122 recessions over the past 50 years in 23 countries and find that a high proportion of them have been followed by lower output or even lower growth. Second, while inflation has decreased, it has decreased less than anticipated, suggesting a breakdown of the relation between inflation and activity. The authors estimate a Phillips curve relation over the past 50 years for 20 countries and find that the effect of unemployment on inflation, for given expected inflation, decreased until the early 1990s but has remained roughly stable since then. The paper concludes with implications for monetary policy.

Data disclosure: The data underlying the figures in this analysis are available here [xlsx].