中国钢铁行业效率研究——基于2002—2008年数据的数据包络分析

Study on Efficiency of China's Steel Industry:Based on Data during 2002-2008 and DEA

运用数据包络分析,对2002—2008年中国钢铁行业23家上市公司的技术效率进行了测算。结果显示:中国钢铁行业整体效率偏低,规模不经济问题较普遍,行业集中度有待提高。差值分析结果表明,中国钢铁行业还存在投入拥挤问题;Malmquist指数分析结果显示,样本企业整体的全要素生产率在研究时间区间内先降后升——这与整个行业2002—2008年盈利水平相一致。最后提出,中国钢铁行业应改善企业的规模效益、重视技术进步、走集约式发展的道路,以促进行业由大转强。

This paper calculates the technical efficiencies of 23 listed companies in China＇s steel industry from 2002 to 2008 by DEA.The result shows that there exist the problems of low efficiency,diseconomy of scale and low industry concentration in China＇s steel industry.Difference analysis result shows the input congestion is another problem existed in China＇s steel industry.And Malmquist index analysis result shows that the total factor productivity of the whole sample first decreased,and then rose during 2002-2008.China＇s steel industry should improve scale benefit,and pay attention to technical progress,and develop intensively.