We conduct an empirical analysis of the technical efficiency of cars sold in Germany in 2010. The analysis is performed using traditional data envelopment analysis (DEA) as well as directional distance functions (DDF). The approach of DDF allows incorporating the reduction of carbon dioxide...

In this paper we report the results from a detailed investigation of the shifts of the world production frontier function over the period 1980-2010. Analogous to a radar we implement a novel measurement approach for these shifts using nonparametrically computed productivity measures to scan the...

Based on an unbalanced panel of all Bavarian cooperative banks for the years of 1989-95 which includes information on 243 mergers, we analyze motives for and cost effects of small-scale mergers in German banking. Estimating a frontier cost function with a timevariable stochastic efficiency term...