Regional efficiency evaluation and development strategy of coal industry chain.

Through the industry linkage analysis of coal and related industries, three basic types of coal industry chain were brought forward. Gave the evaluation method of the industry chain efficiency based on date envelopment analysis (DEA), evaluated the operating efficiency of coal industry chain of 19 regions in China. It turns out that different provinces are different in the coal industry chain efficiency, and the eastern provinces are higher than the middle and western regions. Finally, this paper explored the development strategy of coal industry chain. [ABSTRACT FROM AUTHOR]