As to the relationship between ownership structure and OPE problem, the paper employs positive theory to analyze 58 listed companies, -232 samples from 1998 to 2001.

• 考察了我国证券市场上58家上市公司,共232个样本,针对样本上市公司1998-2001年的数据进行了实证与理论分析,揭示了股权结构与主营业务利润率内在规律。