Standard autocorrelation corrections applied to cointegrating regressions can lead to erroneous first-differencing. Such outcomes are shown to be possible under a range of environments, including cases with autocorrelation coefficients substantially less than 1. First-differencing of a...

In this paper, the authors present evidence that neither large differences in inflation nor long time periods are necessary for a finding favorable to purchasing power parity. Evidence from cointegrating regressions and tests of the real exchange rate indicate that purchasing power parity held...