关键词: DEA, 环境效率, Tobit模型

Abstract: Based on the method of the data envelopment analysis(DEA),this paper estimated the environmental efficiency for 30 provinces/cities in China by using the panel data from 2000 to 2008,and investigated its determinants by using a Tobit model.The estimation results showed that the environmental efficiency of 30 provinces/cities in China changed from 0.7 to 1 and average efficiency was declining at the beginning,but the inflection point was emerged at 2004 or 2005.Environmental efficiency varied differentially across provinces/cities,which was better in the developed provinces/cities in the eastern of China.The difference of environmental efficiency between in the western and in the eastern of China was becoming smaller and smaller from 2005,but the environmental efficiency in the middle of China did not follow this trend.If the input factors including labors,energy and water resources could be used effectively,environmental efficiency would be improved.Economic conditions,population density and dependence on the foreign trade had significantly positive influence on environmental efficiency,while the investment of industry pollution in GDP proportion wasn't closely related with it.Comparatively,GDP per capita and the value of import and export had a bigger positive influence on environmental efficiency.

Key words: data envelopment analysis(DEA), environmental efficiency, Tobit model