Omay, Tolga; Gupta, Rangan; Bonaccolto, Giovanni
(Routledge, 2017)
This article applies the Fractional Frequency Flexible Fourier Form (FFFFF) Dickey–Fuller (DF)-type unit root test on the natural logarithm of US real GNP over the quarterly period of 1875:1–2015:2, to determine whether ...