Abstract: In the light of the theory of the new economic growth and the related approaches of the new economic geography, this paper, from the point of view of urbanization and the spatial attribute of regional economic growth, contructs a regional economic growth model under the action of regional spillovers to analyze the dynamic mechanism between the regional spillovers in urbanization and the regional economic growth convergence. The study shows that the regional spillovers in urbanization and the regional economic growth convergence would supplement each other, i.e., the ever-expansion of urbanization would bring about the convergence of regional economic growth; and the convergence of regional economic growth would further raise the level of urbanization. At the same time, taking 44 districts and counties in Chengdu-Chongqing Economic Zone as examples, this study proves that convergence does exist in regional economic growth. Taking the regional spillovers into account, the speed of the occurance of economic growth convergence in Chengdu-Chongqing Economic Zone is 3.16%. Meanwhile, the contribution of human capital investment to economic growth is greater than that of material capital investment to economic growth. This is also in line with the law of diminishing marginal returns.

Key words: urbanization; regional economic growth convergence; spatial econometrics; regional spillover