Evaluation on economies of scale in China power enterprises based on data envelope analysis

On the base of the status-quo in China's large-scale electricity generation group, this paper first selected Net worth per share, total Current assets as input indicators and ROE(weighted), Basic earnings per share as output indicators, evaluated the economies of scale of power enterprises in China using data envelopment analysis. Then each power enterprises' present economies of scale condition were presented. At last, the paper analyzed the reason aiming at the calculated result and put faward some corresponding proposal.