Based on the industry classification of the listed companies and the evaluation of operational results, this paper uses Mann?Whitney U test to analyse the dynamic operational results, and the degree of the boom of listed companies of every industry.

• 本文将上市公司按行业进行分类 ,并在对这些公司 1999年经营业绩进行综合测评的基础上 ,采用曼 -惠特尼U检验法对经营业绩进行行业动态对比分析 ,并对各行业上市公司 1999年上半年行业经营景气度进行分析。