基于集成超效率DEA模型的煤炭企业生产效率分析

Productivity Analysis of Coal Enterprises Based on Integrated Super-Efficiency Data Envelopment Analysis

在构建输入输出评价指标体系之后,采用集成超效率数据包络模型对煤炭行业上市公司生产效率进行了综合评价,计算出决策单元投入冗余和产出不足,然后运用集成评价方法对上述结论进行定量分析,并运用事前检验和事后检验加以验证。认为大部分煤炭上市企业的生产效率是可以接受的,但是存在着很大的个体差异,许多企业还有很大的上升空间。有效的煤炭企业不仅要保住自身优势,还需要不断加强技术与管理革新,探索更良好的发展模式,带动整个行业的发展。行政管理部门则应该通过经济政策模拟,制定适宜发展规划,对不同的煤炭企业采取不同的措施,最终建立我国煤炭产业的绿色发展模式。

After inputs/outputs index system for coal enterprise is established,some super-efficiency data envelopment analysis（SE-DEA） models are applied to evaluate the performance of nineteen listed coal enterprises,then efficiency scores of all enterprises including inputs redundancy and outputs shortage are attained.Later some portfolio evaluation methods are used to integrate all scores of each enterprise.In order to obtain the most fair and square portfolio method,pre-test and post-test processes are adopted.Results show that the productivity of most enterprises is acceptable.However,there are still many individual differences and lots of enterprises＇ productivity could be improved.Furthermore,efficient enterprises should improve and enhance their technology and management,and even explore better technical and management patterns so as to maintain their advantages and leading position.Administration should establish appropriate economic policies after the simulation,maybe use different rules for different enterprises,which finally achieve green development model of China＇s coal industry.