A note on nonstationarity, structural breaks, and the Fisher eect
نویسنده
چکیده
We ®nd empirical evidence that in ̄ation, nominal, and real interest rates in the US are trend-stationary with a structural break in both the unconditional mean and the drift rate of a deterministic trend, which occurs shortly after the change in operating procedures of the Fed in September 1979. This ®nding casts some doubts on cointegration tests of the long-run Fisher eect conducted in recent studies, since the results of these tests can be aected by the existence of common structural breaks in the series. We propose an alternative test of the Fisher eect, based on a VAR representation in appropriately detrended variables. We ®nd strong support for the Fisher eect both in the medium term and in the long term. Ó 2000 Elsevier Science B.V. All rights reserved. JEL classi®cation: E43; G12; C22
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