Efficiency evaluation on equity finance of coal listed companies on basis of DEA

By using the method of data envelopment analysis(DEA),this paper evaluates the efficiency of equity finance of 14 coal listed companies which are initially offered or equity financing from 2000 to 2005, draw conclusions. According to projection analysis of DEA to adjusts original decision-making units and achieves effective DEA, Furthermore, ways to increase efficiency of equity finance are put forward from input perspective.