English, Article, Journal or magazine article edition: What is What?: A Simple Time-Domain Test of Long-memory vs. Structural Breaks Juan J. Dolado; Jesús Gonzalo; Laura Mayoral

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Bookmark: http://trove.nla.gov.au/version/112055
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • What is What?: A Simple Time-Domain Test of Long-memory vs. Structural Breaks
Author
  • Juan J. Dolado
  • Jesús Gonzalo
  • Laura Mayoral
Physical Description
  • preprint
Notes
  • This paper proposes a new time-domain test of a process being I(d), 0 < d =​ 1, under the null, against the alternative of being I(0) with deterministic components subject to structural breaks at known or unknown dates, with the goal of disentangling the existing identification issue between long-memory and structural breaks. Denoting by AB(t) the different types of structural breaks in the deterministic components of a time series considered by Perron (1989), the test statistic proposed here is based on the t-ratio (or the infimum of a sequence of t-ratios) of the estimated coefficient on yt-1 in an OLS regression of ?dyt on a simple transformation of the above-mentioned deterministic components and yt-1, possibly augmented by a suitable number of lags of ?dyt to account for serial correlation in the error terms. The case where d =​ 1 coincides with the Perron (1989) or the Zivot and Andrews (1992) approaches if the break date is known or unknown, respectively. The statistic is labelled as the SB-FDF (Structural Break-Fractional Dickey- Fuller) test, since it is based on the same principles as the well-known Dickey-Fuller unit root test. Both its asymptotic behavior and finite sample properties are analyzed, and two empirical applications are provided.
  • Unit root tests, structural breaks, fractional integration, long memory
  • RePEc:upf:upfgen:954
Language
  • English
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