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Fractional Dickey-Fuller test with or without prehistorical influence

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  • Ahmed Bensalma

Abstract

Recently, the generalization of the standard Dickey-Fuller test to the fractional case has been proposed. This test, called the fractional Dickey-Fuller (FDF) test, is built on the basis of a composite null hypothesis. The FDF test can be applied to a sample generated from a type I or a type II fractional process. Depending on whether the test is applied to a sample generated from a type I or type II process, it is referred to as a test with or without prehistoric influence, respectively. The primary goal of this research is to investigate the effect of a pre-sample on the finite sample null distribution. The second objective is to highlight the theoretical justifications for the choice of the null composite hypothesis. All the theoretical results are illustrated with simulated and real data sets. Furthermore, to facilitate the reproducibility of our simulation data and figures, we provide all the necessary supplementary material consisting of EViews programs.

Suggested Citation

  • Ahmed Bensalma, 2025. "Fractional Dickey-Fuller test with or without prehistorical influence," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 54(14), pages 4654-4692, July.
    • Handle: RePEc:taf:lstaxx:v:54:y:2025:i:14:p:4654-4692
    DOI: 10.1080/03610926.2025.2488901
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