中文摘要：

本文采用全国地级市数据和复合权重空间杜宾模型（MWMSDM），并将空间外部性和利用能力同时纳入到区域经济增长模型中进行分析，得到如下主要结论：一方面，存在于区域之间的空间外部性以及区域对外来的空间外部性的利用能力都是影响中国区域经济增长的重要因素，并且它们对区域经济增长的促进作用将随着地理距离的增大而逐渐让位于由物质资本投资积累而引发的技术进步和区域AR外部性所带来的促进作用。另一方面，人力资本在促进区域经济增长中的辐射范围呈现梯度递减的极化效应，而物质资本对区域自身经济增长的促进作用随着地理距离增大而逐渐增强，它对邻居区域经济增长的积极作用不易受地理距离的影响，由此使得其在总体上具有显著而又逐渐增大的空间外溢效应。本文的发现在制定区域经济政策及优化物质资本与人力资本投资方面均有重要政策启示。

英文摘要：

By taking spatial spillover and utilizing capacity into the economic growth model at the same time, this paper uses the county data and Multiple Weight Matrices Spatial Dubin Model （MWMSDM） to analyze these two factors and gets following results. On the one hand, both spatial spillover which exists among cities and one region＇s utilizing capacity of external spatial spillover are important factors in China＇s regional economic growth. With the increase of geographical distance, their promoting effect on the regional economic growth will gradually become weaker than the effect from the region＇s AR externality and the technological progress caused by the accumulation of physical capital investment. On the other hand, the radiation range of the human capital＇s positive effect on regional economic growth has polarized effect which shows a gradient decrease. However, the physical capital＇s promoting effect on region＇s own economic growth gets increasingly strengthened, while the geographical distance has little effect on the effect of physical capital on other region＇s economic growth, these two effects make the physical capital has significant and gradually increasing spatial spillover on the whole. These findings have an important enlightenment on making regional economic policy and optimizing physical capital investment as well as human capital investment.