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1. Low inflation bends the Phillips curve around the world

Author:
Kristin Forbes, Joseph E. Gagnon, and Christopher G. Collins
Publication Date:
03-2020
Content Type:
Working Paper
Institution:
Peterson Institute for International Economics
Abstract:
This paper models inflation by combining the multicountry framework of one of its authors (Forbes) with the nonlinear specification proposed by the other two (Gagnon and Collins). The results find strong support for a Phillips curve that becomes nonlinear when inflation is low, in which case excess economic slack has little effect on inflation. This finding is consistent with evidence of downward nominal wage and price rigidity. The estimates also show a significant and economically meaningful Phillips curve relationship between slack and inflation when slack is negative (i.e., when output is above long-run potential). In this nonlinear model, international factors play a large role in explaining headline inflation, a role that has increased over time, supporting the results of Forbes’ linear model.
Topic:
Economics, Inflation, and Data
Political Geography:
Global Focus

2. Low Inflation Bends the Phillips Curve

Author:
Joseph E. Gagnon and Christopher G. Collins
Publication Date:
04-2019
Content Type:
Working Paper
Institution:
Peterson Institute for International Economics
Abstract:
The Phillips curve, which traces out a negative relationship between inflation and unemployment, has undergone tremendous changes over more than 100 years. Some researchers argue that the slope of the curve in the United States fell substantially around 20 years ago so that unemployment now has little or no effect on inflation. This paper shows that another hypothesis is equally consistent with the data: The Phillips curve may be nonlinear when inflation is low, with the economy having operated in the flat region of the curve for most of the past 20 years. The next few years may be decisive in the debate between these hypotheses, as unemployment has returned to a range in which a nonlinear curve ought to display significant steepness. A flat Phillips curve implies little change in inflation going forward, but a nonlinear curve implies moderate increases in inflation over the next few years.
Topic:
Economics, Inflation, and Unemployment
Political Geography:
North America and United States of America