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...

This paper finds 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...

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...

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...

This paper models inflation by combining the multi-country 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...