Discussion paper

DP1153 Measuring Core Inflation

In this paper we argue that measured (RPI) inflation is conceptually mismatched with core inflation: the difference is more than just `measurement error'. We propose a technique for measuring core inflation based on an explicit long-run economic hypothesis. Core inflation is defined as that component of measured inflation that has no (medium- to) long-run impact on real output - a notion that is consistent with the vertical long-run Phillips curve interpretation of the co-movements in inflation and output. We construct a measure of core inflation by placing dynamic restrictions on a vector autoregression (VAR) system.


Quah, D (1995), “DP1153 Measuring Core Inflation”, CEPR Press Discussion Paper No. 1153. https://cepr.org/publications/dp1153