Munich Personal RePEc Archive

Inflation and Breaks: the validity of the Dickey-Fuller test

Ventosa-Santaularària, Daniel and Gómez, Manuel (2006): Inflation and Breaks: the validity of the Dickey-Fuller test. Published in: Brazilian Review of Econometrics , Vol. 29, No. 1 (2009): pp. 1-14.

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Abstract

This article proves the asymptotic efficiency of the Dickey Fuller (DF) test when the Data Generating Process of the variable under consideration is in fact mean stationary with breaks. Monte Carlo simulations show that asymptotic properties remain valid for sample sizes of practical interest.

We illustrate its performance by studying inflation rate series, a variable that should be stationary if the monetary authority follows an effective inflation targeting regime: shocks are short-lived, therefore, inflation fluc- tuates randomly around pre-specified targets.

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