摘要
城市经济聚集度是影响生产效率的重要因素,不同规模城市的生产率存在明显差异。在明晰作用机制和影响路径的基础上,文章利用中国地级及以上城市面板数据检验城市经济密度与全要素生产率的“倒U形”关系和城市规模的调节效应。研究结果表明,在规模经济正外部性和拥挤效应负外部性的共同作用下,城市经济密度对全要素生产率的影响呈稳健的“倒U形”特征,城市经济密度的总体门槛值为34亿元/平方公里;城市规模对两者之间的关系起正向调节作用,城市规模扩大有利于提高经济密度门槛值。新发展格局下,需采取因地制宜的城市发展策略,推动大中小城市协调发展,规避城市蔓延,不断提高城市生产率。
The degree of urban economic agglomeration is an important factor affecting production efficiency, and significant differences prevail in the productivity of cities of different scales. In this study, we build a theoretical model on the“inverted U-shaped”relationship between urban economic density and total factor productivity, and also test the relationship empirically using the panel data of cities at and above the prefecture level in China, with the perspective of moderating effect of city size. Our study finds that, combined with the positive externalities of scale economies and the negative externalities of crowding effects, the impact of urban economic density on total factor productivity shows a robust“inverted U-shaped”feature. The overall threshold of economic density was 3.4 billion Yuan per square kilometers. And the city size plays a positive role in regulating the effect in that the expansion of city size is conducive to raising the economic density threshold. Under the new development pattern, it is necessary to promote coordinated developments of large, medium and small cities, and adopt urban development strategies tailored to local conditions to avoid urban sprawl.
作者
程开明
刘书成
Cheng Kaiming;Liu Shucheng
出处
《中国人口科学》
CSSCI
北大核心
2022年第6期39-54,126,共17页
Chinese Journal of Population Science
基金
国家社科基金重大招标项目“中国城镇化阶段性特征统计测度及驱动效应评估研究”(编号:20&ZD133)的阶段性成果。
