an empirical research based on the date of Chinese enterprises 集聚、出口与生产率:基于中国工业企业数据的实证研究:an empirical research based on the date of Chinese enterprises theory and empirical research based on Chinese enterprise an empirical research based on B2B perspective an empirical research based on China listed power companies an empirical study based on the data of the listed companies of central enterprises an empirical research based on Chinese stock market since 1999 an empirical research on the listed companies in China an empirical study based on Chinese experience an emprical research based on complicated scientific theory