Shan, Q., 2020. The influence of trade agglomeration on technology diffusion in coastal cities in different time and space. In: Yang, Y.; Mi, C.; Zhao, L., and Lam, S. (eds.), Global Topics and New Trends in Coastal Research: Port, Coastal and Ocean Engineering. Journal of Coastal Research, Special Issue No. 103, pp. 543–547. Coconut Creek (Florida), ISSN 0749-0208.

In order to realize the coordinated economic development of coastal cities, the influence of trade agglomeration on technology diffusion effect of coastal cities in different time and space is put forward. This paper analyzes the influence of main factors and technological factors on the diffusion effect of technology in coastal cities, and obtains the influence of internal factors of trade agglomeration on the diffusion effect of technology. Based on the analysis of economic environment and policy environment of city agglomeration, the influence of external factors of trade agglomeration on technology diffusion effect is obtained. The relationship between trade agglomeration and economic efficiency was tested by systematic GMM and panel regression. Trade agglomeration in each city has a significant promoting effect on scale efficiency, and has a significant difference on total factor productivity and other decomposition index. Therefore, some suggestions are put forward, such as taking the market as the core of the reform, strengthening the reform of the trade supply side, “moving from the virtual to the real”, promoting innovation-driven development and expanding trade opening.