Comprehensive Evaluation of Environmental TFP Index in China: Based on the DEA Model of Directional Distance Function

In the process of Chinese industrialization, industrialization has significantly effects on economic growth, but also poses a serious environmental problem. Under the DEA way of Directional Distance Function to make up for the deficiency of the traditional DEA model, using the directional distance function of VRS linear programming model, China’s Environmental TFP Index is evaluated. The results showed that: for the time trend, China’s industrial environmental TFP presents a dynamic process, which affected by a number of major events or policy changes; for different regions, there are some differences in unbalanced regional development, and industry TFP changes. Overall, levels of Environmental TFP Index in china are on the decline, technological advance is a key factor to improve industrial environmental TFP, technical efficiency is secondary cause.