Environmental performance measure and its temporal-spatial changes in China based on DEA and Malmquist index models

Take funds,capital,human and technical input as the environmental input elements,and the environment protection performance,economic and social benefits,the role of technology and environmental management system itself as a key output items,on the basis of which building environmental efficiency measurement system,and employing DEA model and Malmquist productivity index,this paper probes into the environmental efficiency of 31 regions in China and its changes.Firstly,since the new century,China's environmental efficiency is generally high,but the slow decline in the volatility,and there has a larger gap between regions,except for the technical efficiency.Secondly,overall,the spatial variation of environmental efficiency is significant,Eastern CE and SE is lower than western and central,in the technical efficiency,westerneasterncentral.Thirdly,the environmental efficiency changes research based on Malmquist index find that the efficiency change index has similar trends of 2001-2006 and 2001-2009,environmental efficiency and its decomposition were generally decreased,and technology and productivity changes are the rise,however,contrary 2006-2009.Fourthly,the spatial distribution of environmental efficiency changes is that efficiency change index were decreased in 2001-2006 and 2001-2009,but eastern stronger than western and central,technology and productivity increased significantly,and the most significant progress in central,eastern slowest,however contrary 2006-2009.Finally,we further find it is the SE and its changes that determine the temporal-spatial and distribution patterns of environmental protection.In short,the key is to improve SE,full-scale additional investment in environmental protection,priority to grow the environmental scale of development,and guide the environmental protection facilities to gather supporting and sharing to build,that is important measures to improve the environmental efficiency and SE and promote environmental health and sustainable development.