A theoretical and empirical analyses to China's foreign trade and environment quality Theoretical and empirical analysis on longevity risk and its management Theoretical and empirical analysis of credit and risk in internet finance 并列题名：Theoretical and empirical analysis of credit and risk in internet finance Theoretical and empirical study on relation of physical and environmental reproduction 人力资本：a theoretical and empirical analysis, with special reference to education Theoretical and empirical analysis on insurance and protection for women and children 并列题名：Theoretical and empirical analysis on insurance and protection for women and children