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...

China’s agricultural productivity has achieved remarkable accomplishments in agricultural sector after China’s accession to World Trade Organization (WTO). According to National Bureau of Statistics of China (NBSC), the total meat production in 2018 is 43% more than in 2000, and the total...