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Fluctuation Tests for a Change in Persistence

Listed author(s):
  • A. M. Robert Taylor

In this paper, we develop a set of new persistence change tests which are similar in spirit to those of Kim ["Journal of Econometrics" (2000) Vol. 95, pp. 97-116], Kim "et al." ["Journal of Econometrics" (2002) Vol. 109, pp. 389-392] and Busetti and Taylor ["Journal of Econometrics" (2004) Vol. 123, pp. 33-66]. While the exisiting tests are based on ratios of sub-sample Kwiatkowski "et al." ["Journal of Econometrics" (1992) Vol. 54, pp. 158-179]-type statistics, our proposed tests are based on the corresponding functions of sub-sample implementations of the well-known maximal recursive-estimates and re-scaled range fluctuation statistics. Our statistics are used to test the null hypothesis that a time series displays constant trend stationarity ["I"(0)] behaviour against the alternative of a change in persistence either from trend stationarity to difference stationarity ["I"(1)], or vice versa. Representations for the limiting null distributions of the new statistics are derived and both finite-sample and asymptotic critical values are provided. The consistency of the tests against persistence change processes is also demonstrated. Numerical evidence suggests that our proposed tests provide a useful complement to the extant persistence change tests. An application of the tests to US inflation rate data is provided. Copyright 2005 Blackwell Publishing Ltd.

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Article provided by Department of Economics, University of Oxford in its journal Oxford Bulletin of Economics & Statistics.

Volume (Year): 67 (2005)
Issue (Month): 2 (April)
Pages: 207-230

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Handle: RePEc:bla:obuest:v:67:y:2005:i:2:p:207-230
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