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Evaluation of the Ecological Efficiency in the Coal Industry Based on DEA

LIAO Xianling;LI Yuran;MAN Yanru;Shandong University of Science and Technology,College of Economics and Management;  
Based on the theory and method of Data Envelopment Analysis,this paper screens the input and output indicators of China's coal industry in the range of 2001-2013 and turns them into time series data.With these data,this paper analyzes the ecological efficiency of China's coal industry.Research showed that:in the 13 years,the ecological efficiency of China's coal industry was maintaining rising tendency basically.Pure technical efficiency and scale efficiency played different roles in different stages of the development of coal industry in our country.Finally,this paper provids some suggestions of the ecological management based on the concept of sustainable development.
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