Research on the formation mechanism of and spatial spillover effect of industrial coagglomeration 并列题名：Research on the formation mechanism of and spatial spillover effect of industrial coagglomeration Research on the national income growth effect of industrial agglomeration 并列题名：Research on the national income growth effect of industrial agglomeration Research on the impact mechanism of spillover effect of Word-of-mouse Research on the formation mechanism of status consumption Research on the interactive development of new urbanization and industrial agglomeration