Is Inflation Persistence Intrinsic in Industrial Economies?

Abstract: Many empirical studies have indicated that inflation exhibits very high persistence throughout the post-war period in nearly every industrial economy. In this paper we challenge this conventional wisdom and instead argue that in many cases, high inflation persistence is an artifact of empirical techniques that fail to account for occasional shifts in the monetary policy regime. In particular, we estimate autoregressive models of inflation for twelve OECD countries over the period 1984-2004, and we then perform tests for the existence of a structural break at an unknown date. For eight of the twelve countries, we find strong evidence for a break in intercept in the late 1980s or early 1990s; furthermore, conditional on the break in intercept, each inflation measure generally exhibits much lower persistence. Evidently, high inflation persistence is not an inherent characteristic of industrial economies.