中国城市环境治理效率评估及其时空变异研究

he urban environment management and protection is the current hot topic, the level of urban environmental governance efficiency plays a decisive role to the urban environmental management and improvement and restricts urban sustainable development.This paper from the fund, capital, technology ,labor input ,economy, social and environmental output seven aspects, constructing evaluation index system, using DEA model to assess the urban environmental governance efficiency of 270 citys in China during 2003-2007, the results show: 1) the urbanenvironmental governance efficiency in long-term of china is generally low ,scale efficiency> technical efficiency> comprehensive efficiency; 2) the urban environmental governance efficiency of china in time series change and spatial differentiation is significant, the characteristics in long-term maintain large dispersion - small concentration; 3）Technology and capital investment are the key factors to improve urban environmental governance efficiency, and capital investment has negative correlation; 4) To 0.9 for technical efficiency and scale efficiency boundaries of the urban environmental governance, divided 270 sample cities into four classes, there are the high-tech efficiency - high scale efficiency of HT-HS type, the high-tech efficiency-low scale efficiency of HT-LS type , the low technical efficiency-high scale efficiency of the LT-HS type and the low technical efficiency-low scale efficiency of LT- LS type,and the cities numbers of four types is HT-LS>LT-LS> LT-HS> HT-HS; 5) To redundancy more than 20% as the boundary, divided the urban environmental governance efficiency optimization model into five development models ,there are the maintain the status quo, money-saving, capital-saving, labor-saving, technology-saving five , and nearly half of the cities can take to maintain the status quo and four-pronged type development model.