“…When being assumed in first generation panel unit root tests that all the units affected at the same rate from a shock happened just in one section; accepted in second generation panel unit root tests that each unit effects at different ratios from the same shock. Within this scope, the first generation panel unit root tests (Hadri 2000, Levin et al, 2002, Im et al, 2003, Breitung 2005 do not provide consistent results in case of being the cross section dependence; and the second generation panel unit root tests allow for (Taylor and Sarno 1998, Breuer et al, 2002, Pesaran 2007, Hadri and Kurozumi, 2012, the cross section dependence should be used. Consequently, in panel data studies, the cross section dependence in cointegration equation of the model or series in the model should be analyzed before estimating the models, then the unit root and the following tests used in analyses should be specified.…”