Scandinavian Working Papers in Economics

SSE/EFI Working Paper Series in Economics and Finance,
Stockholm School of Economics

No 330: Is the short-run Phillips curve nonlinear? Empirical evidence for Australia, Sweden and the United States

Ann-Charlotte Eliasson
Additional contact information
Ann-Charlotte Eliasson: Dept. of Economic Statistics, Stockholm School of Economics, Postal: P.O. Box 6501, S-113 83 Stockholm, Sweden

Abstract: The Phillips curve has generally been estimated in a linear framework which implies a constant relationship between inflation and unemployment. Lately there have been several studies which claim that the slope of the Phillips curve is a function of macroeconomic conditions and that the relationship is asymmetric. If this is true the assumption of linearity is too restrictive. In this paper linear Phillips curves for Australia, Sweden and the United States are tested for linearity and parameter constancy. The nonlinear alternative is specified as a smooth transition regression model. It turns out that linearity is rejected for both Australia and Sweden while the Phillips curve for the United States is linear.

Keywords: Phillips curve; dynamic model; econometric model building; encompassing; parameter constancy; smooth transition regression

JEL-codes: C52; E31

37 pages, September 8, 1999

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