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DEA方法的CCR模型难以解决相对有效单元进一步识别的问题,而超效率模型通过重新定义生产可能集,可以对决策单元进行充分排序和评价。本文以中国9家石油天然气上市公司为样本,运用CCR模型和超效率模型,对2011年下半年石油天然气上市公司的经营效率进行了实证分析,结果表明,超效率值大小的顺序即是各个公司经营效率的强弱排序,对投资者投资具有较高的参考价值。
The CCR model of DEA method can not solve the problem of further identification of relatively valid units, and the super efficiency model can fully sort and evaluate decision units by redefining the production possible sets. In this paper, nine oil and gas listed companies in China as a sample, the use of CCR model and super-efficiency model, the second half of 2011, an empirical analysis of the operating efficiency of oil and gas listed companies, the results show that the magnitude of super-efficiency value is the order of each company Ranking the strength of business efficiency, investors have a higher reference value.