Long run and cyclical strong dependence in macroeconomic time series. Nelson and Plosser revisited

Luis Gil-Alana

No 17/06, Faculty Working Papers from School of Economics and Business Administration, University of Navarra

Abstract: This paper deals with the presence of long range dependence at the long run and the cyclical frequencies in macroeconomic time series. We use a procedure that allows us to test unit roots with fractional orders of integration in raw time series. The tests are applied to an extended version of Nelson and Plosser's (1982) dataset, and the results show that, though the classic unit root hypothesis cannot be rejected in most of the series, fractional degrees of integration at both the zero and the cyclical frequencies are plausible alternatives in some cases. Additionally, the root at the zero frequency seems to be more important than the cyclical one for all series, implying that shocks affecting the long run are more persistent than those affecting the cyclical part. The results are consistent with the empirical fact observed in many macroeconomic series that the long-term evolution is nonstationary, while the cyclical component is stationary.

Pages: 28 pages
Date: 2006-12-03
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Citations: View citations in EconPapers (1)

Published in Empirica 34, 2, 139-154 (2007)

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Journal Article: Long run and cyclical strong dependence in macroeconomic time series: Nelson and Plosser revisited (2007)
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