Author: Joseph E. Gagnon / Topic: Inflation

Author:: Joseph E. Gagnon and Asher Rose
Publication Date:: 12-2024
Content Type:: Working Paper
Institution:: Peterson Institute for International Economics (PIIE)
Abstract:: COVID era inflation was driven by a unique combination of three shocks: First, a plethora of pandemic-related shifts in demand patterns and disruptions to supply caused prices of consumer durable goods to skyrocket. Second, the Ukraine war caused the largest global commodity price surge in 40 years, which mainly affected prices of nondurable goods such as food and gasoline. Third, strong monetary and fiscal responses to the pandemic recession caused labor markets to tighten, pushing up prices of services. This paper estimates models of the components of consumer prices in each G7 economy in order to document the transmission of these shocks. The first two shocks had run their course by 2023, enabling overall inflation to decline sharply from its 2022 peak. But labor markets remained at least moderately tight in most G7 economies in 2024, and services inflation remained noticeably higher than its pre-pandemic level.
Topic:: Economy, Inflation, G7, COVID-19, and Goods and Services
Political Geography:: Global Focus

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

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

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

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