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1. Low inflation bends the Phillips curve around the world: Extended results

Author:
Jami Forbes, Joseph E. Gagnon, and Christopher G. Collins
Publication Date:
09-2021
Content Type:
Working Paper
Institution:
Peterson Institute for International Economics (PIIE)
Abstract:
This paper revises and extends PIIE Working Paper 20-6. It continues to find strong support for a Phillips curve that becomes nonlinear when inflation is "low"—which our baseline model defines as less than 3 percent. The nonlinear curve is steep when output is above potential (slack is negative) but flat when output is below potential (slack is positive) so that further increases in economic slack have little effect on inflation. This finding is consistent with evidence of downward nominal wage and price rigidity. When inflation is high, the Phillips curve is linear and relatively steep. These results are robust to placing the threshold between the high and low inflation regimes at 2, 3, or 4 percent inflation or for a threshold based on country-specific medians of inflation. In this nonlinear model, international factors play a large role in explaining headline inflation (albeit less so for core inflation), a role that has been increasing since the global financial crisis.
Topic:
Economics, Financial Crisis, Inflation, and Philips Curve
Political Geography:
Global Focus

2. 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 (PIIE)
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

3. How the G20 can hasten recovery from COVID-19

Author:
Maurice Obstfeld, Adam S. Posen, Olivier Blanchard, Chad P. Bown, Cullen S. Hendrix, Ana González, Simeon Djankov, Anne-Laure Kiechel, Anna Gelpern, Sean Hagan, Adnan Mazarei, Christopher G. Collins, Simon Potter, Edwin M. Truman, and Joseph E. Gagnon
Publication Date:
04-2020
Content Type:
Special Report
Institution:
Peterson Institute for International Economics (PIIE)
Abstract:
The world's leading economic powers must cooperate more to combat the health and economic shocks resulting from the COVID-19 pandemic. In a new PIIE Briefing, Peterson Institute experts outline how collective action by the Group of Twenty (G20) nations can make a difference. The PIIE agenda includes removal of trade barriers impeding the flow of medical supplies and food, and more money for research, testing, and disease control, especially for debt-burdened low-income countries. The World Bank and the World Health Organization need more resources to relieve suffering, and the International Monetary Fund must step up to stabilize the world financial system.
Topic:
Economics, Health, World Health Organization, International Monetary Fund, World Bank, G20, and Coronavirus
Political Geography:
Global Focus

4. 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 (PIIE)
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