中国城市生产性服务业集聚效应测度

Identification of agglomeration effects of producer services of China's cities

基于外部性和新经济地理理论综合视角构建了理论、计量模型,对我国286个地级及以上城市的生产性服务业集聚效应进行了测度。研究发现,生产性服务业专业化和多样化集聚主要通过技术外部性作用于经济增长,且专业化集聚的影响更明显;而生产性服务业空间集聚规模则是市场外部性的来源,其通过城市间投入—产出的垂直关联效应作用于经济增长。生产性服务业专业化集聚的作用由东向西逐步递增,而多样化集聚仅对东部地区影响显著;生产性服务业空间集聚规模的影响则由东向西依次递减;随着经济增长分位数增加,生产性服务业专业化集聚和空间集聚规模对经济增长的影响均呈倒U型趋势,且多样化集聚的影响不断增强。

Based on the integrated framework of externalities and new economic geography,this essay builds theoretical and econometric model and measurement of producer services agglomeration,and makes estimates on the effects of the agglomeration of producer services of 286 prefectural- and- above cities. The results find that specialization and diversification agglomeration of producer services positively affect economic growth mainly through technological externalities,and the effect of specialization agglomeration is more significant. And the spatial agglomeration scale of producer services focuses on demand side to impact economic growth through spatial economies of scale. The effect of specialization agglomeration of producer services is larger in the west than that in the east and central part of China,and the effects of diversification agglomeration are significant only in the eastern part of China. The effect of spatial agglomeration scale on economic growth is decreasing from east to west in China. With economic growth percentile increasing,the effects of specialization agglomeration and spatial agglomeration scale of producer services on economic growth exhibit inverted U- shaped trend,and the effects of diversification agglomeration are increasing.