基于松弛的SBM模型可综合评价决策单元的环境效率和经济效率。运用改进的SBM模型对西部省区环境—经济效率测算的结果表明,西部多数省区环境与经济效率较低且呈下降趋势,说明西部地区经济发展方式仍然粗放。应切实转变经济发展方式,发展循环经济,实行有区别的环境规制政策和减排目标。 Based on the relaxed SBM model, the environmental efficiency and economic efficiency of decision-making unit can be evaluated synthetically. Using the improved SBM model, the results of environmental-economic efficiency calculation in western provinces show that the environmental and economic efficiency of most western provinces is low and declining, which shows that the economic development in the western region is still extensive. We should effectively change the mode of economic development, develop a recycling economy and implement differentiated environmental regulatory policies and emission reduction targets.