Nguyen, Anh; Hénin, Pierre-Yves; Jolivaldt, Philippe - Centre pour la Recherche Économique et ses … - 2001
The is a growing trend of criticism against the use of panel data unit root test for assessing hypotheses such as the purchasing power parity. The usual argument of a gain in power with respect to univariate unit root tests is not relevant as different nulls are involved when testing on panel...