Omay, Tolga2020-05-082020-05-082015Omay, Tolga, "Fractional frequency flexible fourier form to approximate smoothbreaks in unit root testing" Economic Letters, Vol.134, pp.123-126 (2015).0165-1765http://hdl.handle.net/20.500.12416/3658In this study, a Fractional Frequency Flexible Fourier Form DF-type unit root test is proposed. The small sample properties of the proposed test are found to be better than that of the integer frequency counterpart.eninfo:eu-repo/semantics/closedAccessFractional Frequency Flexible Fourier FormStructural BreakNonlinear TrendUnit RootArticle13412312610.1016/j.econlet.2015.07.010