Using median-unbiased estimation based on Augmented Dickey--Fuller (ADF) regressions, recent research has questioned the validity of Rogoff's ‘remarkable consensus’ of 3--5 year half-lives of deviations from Purchasing Power Parity (PPP). The confidence intervals of these half-life...

Measuring deviations from purchasing power parity has been the subject of extensive investigation. The most common practice in empirical research for measuring real exchange rate persistence is to estimate univariate autoregressive (AR) time series models and calculate the half-life, defined as...