Research on FDI technology spillover effect of the high-tech industry agglomeration Research on export spillover effect of FDI in industrial cluster Research on the technological spillover effect of FDI in China Research on the national income growth effect of industrial agglomeration Research on the time and space evolution of American cultural industry agglomeration Research on the reverse technology spillover effect of OFDI from the perspective of absorptive capacity Research on reverse technology spillover effect and influencing factors of OFDI