Evaluation of regional environmental efficiencies in China based on super-efficiency-DEA

This study measures the environmental efficiency of China based on environmental super-efficiency data envelopment analysis (SEDEA) model by using data of 30 provinces in China during the period of 2000–2010. We find that environmental efficiencies across 30 provinces show regional disparities. Cities such as Beijing and Shanghai have experienced improvement in efficiency while Qinghai showed worse performance. More generally, East areas are more efficient in production while the west rank the last with central areas ranking in between during the period studied. Policies should be established to further promote production efficiency.