Munich Personal RePEc Archive

Residual Augmented Fourier ADF Unit Root Test

Yilanci, Veli and Aydin, Mücahit and Aydin, Mehmet (2019): Residual Augmented Fourier ADF Unit Root Test.

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This paper proposes a residual-based unit root test in the presence of smooth structural changes approximated by a Fourier function. While Fourier Augmented Dickey Fuller test that introduced by Enders and Lee (2012a) allows smooth changes of the unknown form, the Residual Augmented Least Squares procedure use additional higher moment information found in non-normal errors. The test offers a simple way to accommodate an unknown number and form of structural breaks and have good size and power properties in the case of non-normal errors.

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