Karavias, Yiannis; Tzavalis, Elias; Zhang, Haotian - In: Econometrics : open access journal 10 (2022) 1, pp. 1-11
unit root tests could be extended to the case of unbalanced panels, but this is often difficult because the missing … two popular panel unit root tests to allow for missing values, and secondly, it employs asymptotic local power functions …