The Chinese Phillips curve – inflation dynamics in the presence of structural change

Abstract

This paper models inflation dynamics in China from 1987-2014 using a Phillips curve framework. The Phillips curve is generally estimated under the assumption of linearity and parameter constancy. The existence of structural breaks in China's inflation dynamics make standard linear models inappropriate tools for analysis however. Our results find that the Chinese Phillips curve is characterised by a non-linear relationship. The inflation/output relationship takes the form of a concave curve. This suggests that changes in the level of output effect inflation in China more strongly in periods when output is operating below its potential but the relationship is weaker when output is operating at or above potential. Based on these findings, the People's Bank of China (PBC) could consider output cost and policy response on a case by case basis depending on the level of output in relation to potential.

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“…Based on inflation dynamics from 1987 to 2014 in China, Egan and Leddin found that the Chinese Phillips curve manifests a non-linear relationship. That is to say, the inflation/output curve is in a concave shape [8]. Similarly, Zhang provided empirical evidence that indicate significant nonlinearities in China's Phillips curve [9].…”