基于DEA的中国西部地区环境效率实证分析

An Empirical Analysis of Environmental Efficiency in Western Regions of China Using DEA

运用DEA模型测度了2001—2008年间我国西部地区12个省市区的相对环境效率,并结合Malmquist指数对期间各地区环境效率变化趋势进行了分析。研究结果表明:我国西部各区域的相对环境效率总体水平比较低,环境污染造成了较大程度的效率损失;西部地区的环境绩效具有较大的省际差异,且省际差异在研究年份内经历先逐年减小再逐年扩大的演变过程;西部各省市环境效率与经济发展水平之间并没有明显的相关关系;西部大开发战略实施以来,西部地区在研究年份内的环境效率都得到了不同程度的改善。

This paper uses data envelopment analysis （DEA） model to measure the relative environ- mental efficiency of 12 provinces in western regions of China for the period 2001-2008 and analyses the variation trends of the environment efficiency of each region combining the Malmquist index. The results indicate that ： （ 1 ） the overall level of the relative environmental efficiency is low in the western regions of China, and the environment pollution caused a larger degree of efficiency loss ; （2） there is a large interprovincial difference in the environmental performance of the western regions, and the difference presents an evolutionary process that it first reduces year by year then grows year by year in research periods; （3） there is no obvious relevant relation between the environmental efficiency and economic development levels of western provinces and cities; （4） since the implementation of the west development strategy the environmental efficiency of western regions get different degrees of im- provements in the research period.