an empirical research based on China listed power companies an empirical research on China's listed companies 规制、公司治理与企业效率：基于中国发电类上市公司的研究：an empirical research based on China listed power companies an empirical research based on Chinese stock market since 1999 an empirical research based on B2B perspective an empirical research based on the date of Chinese enterprises an emprical research based on complicated scientific theory an emperical study on Chinese listed companies an empirical research on Chinese stock markets empirical research based on listed companies in China