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On the finite sample size and power of the generalized KPSS test in the presence of level breaks

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  • Peter Sephton

Abstract

The KPSS stationarity test is oversized when it is applied to a series containing a strong autoregressive process. Hobijn et al. (2004) demonstrated that the test appears to be better-sized when an automatic-data dependent bandwidth selection procedure is used to estimate the long-run variance of the series. This article examines the impact of level breaks under the null on the finite sample size and power of their generalized KPSS test. It demonstrates that empirical sizes depend critically on the location and the magnitude of the break and that the generalized test is not as robust to variance estimation as was previously thought. The results are shown to be similar to those based on the traditional approach to calculating the KPSS test.

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  • Peter Sephton, 2008. "On the finite sample size and power of the generalized KPSS test in the presence of level breaks," Applied Economics Letters, Taylor & Francis Journals, vol. 15(11), pages 833-843.
  • Handle: RePEc:taf:apeclt:v:15:y:2008:i:11:p:833-843
    DOI: 10.1080/13504850600770962
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    Cited by:

    1. Omid Bozorg-Haddad & Mohammad Solgi & Hugo A. LoƔiciga, 2017. "Investigation of Climatic Variability with Hybrid Statistical Analysis," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(1), pages 341-353, January.
    2. repec:kap:compec:v:50:y:2017:i:1:d:10.1007_s10614-016-9586-z is not listed on IDEAS

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