Filippini, Massimo - 2016
's competitiveness being an increase in the firms' level of cost efficiency, the goal of this study is to quantify the firms' level of … persistent and transient cost efficiency using the generalized true random effects (GTRE) model introduced by Colombi et al … efficiency of 65 Swiss hydropower firms is analyzed for the period between 2000 and 2013. For comparison, a true random effects …