本文应用DEA模型对钢铁上市公司的业绩进行了实证研究。通过DEA有效分析和规模收益分析对十四家上市公司的业绩进行了效率衡量，为投资者理性投资提供了参考依据，也为上市公司提高效率提供了数据借鉴。-Using DEA model of the steel the performance of listed companies in the empirical study. DEA through effective analysis and scale benefit analysis of 14

1.1 DEA方法和SFA方法的区别1.1.1 SFA方法的产生1.1.2 SFA方法简介-1.1.1 SFA methods produce 1.1 DEA and SFA method difference method Introduction 1.1.2 SFA