摘要
现实生产中产出的非期望输出往往是多维度的。然而,在学术界,尚未有学者关注弱自由处置假设下存在多维非期望产出以及总额限制时的环境绩效评价问题。本文将现有的零和收益(Zero Sum Gains,ZSG)DEA模型中的非期望产出从单维度扩展到多维度的情形,提出了一类非径向ZSG-DEA模型。接着,针对该类模型存在难以求解的问题,通过适当变换,降低了模型的计算难度,并且提供了一种可行的方案求解某些不存在可行解的有效单元。最后,将所提模型应用于评价我国30个行政区域的环境效率的实证研究中,验证了方法的适用性和有效性。
Accompanying the rapid growth of China's economy,environmental issues arouse more and more social attention.The very first step to respond effectively to environmental problems is to evaluate the environmental efficiency precisely.In many production processes,multiple undesirable outputs(e.g.,pollutants)are accompanied with desirable outputs.Meanwhile,the undesirable outputs are subject to production restrictions due to widespread environmental regulation.Under these circumstances,the evaluation of environmental performance becomes a hot topic in the literature.Data envelopment analysis(DEA),a frequently used performance evaluation technique,is employed to measure environmental performance.Under the assumption that undesirable output satisfies weak disposability,a non-radial zero sum gains(ZSG)-DEA model,which enhances the existing models by switching from a single undesirable output to multiple undesirable outputs,is put forward.In terms of proper transformations,the difficulty in solving the proposed model is alleviated,and the infeasibility issue for certain efficient DMUs is circumvented.At last,an empirical application to the evaluation of the environmental efficiencies of 30 administrative regions in China is illustrated(data resource:database of CNKI and China Statistical Yearbook-2012).The empirical evidence indicates that the ZSG environmental performance of a region is positively correlated with its economic development level.In addition,for the component efficiencies of most regions,the performance of wastewater discharged is higher than that of waste gas emission,and the performance of solid wastes produced is lowest among them.The result implies these regions should pay more attention on the control of solid wastes produced.Last but not the least,all the considered regions in China show decreasing returns-to-scale in economic productivity.All findings suggest that adjustment and promotion of industrial structure is critical and essential,which also matches the current policy of supply-side structural
出处
《中国管理科学》
CSSCI
CSCD
北大核心
2017年第10期42-51,共10页
Chinese Journal of Management Science
基金
国家自然科学基金青年项目(71601062)
安徽省自然科学基金青年项目(1708085QG165)
