Operating efficiency of Chinese large coal enterprises based on DEA

As the foundation of our industry, the coal industry is vital to the development of national economy. In this paper, date envelopment analysis (DEA) was applied to evaluate the operating efficiency of 20 large coal enterprises in China. It turned out that most of the coal business are inefficient, mainly due to idle assets, redundant personnel and the constraints of size; finally, this paper explored the way of improving the operating efficiency of coal enterprises.