多中心结构、市场整合与经济效率

Polycentric Structures,Market Integration and Economic Performance

本文基于校正后的城市夜间灯光数据测算各省份的多中心结构指数,运用工具变量估计考察区域多中心空间发展模式对中国城市经济效率的动态影响,并探讨了市场一体化在其中所发挥的交互效应。研究发现,首先,多中心结构对我国城市经济效率的影响呈现显著的先促进后抑制的“倒U”型特征,且该影响主要体现在大城市和东中部地区,而中小城市和西部城市的经济效率则随着多中心水平的提高而提升。同时,测算结果显示,目前我国少数地区的经济效率由于多中心水平过高的空间发展模式而受到抑制。其次,多中心结构与市场一体化之间存在明显的替代效应,且该效应主要体现在中小城市和东中部地区。最后,城市距离和交通基础设施在多中心结构影响经济效率过程中发挥了显著的非线性调节作用。本文研究对我国未来城市规模体系发展模式提供了一定的经验证据和政策启示。

Based on the adjusted urban nightlight data,this paper calculates the polycentric structure index for each province,adopts the method of instrumental variables to investigate the dynamic impact of the regional polycentric development pattern on urban economic performance in China,and discusses the interactive effect of market integration therein.It is found that,firstly,the impact of polycentric structure on urban economic performance in China presents a significant inverted U-shaped feature,and this effect mainly exists in large cities and eastern and central regions,while the economic performance of small and medium-sized cities and western cities could be improved by the increase of polycentric level.In the meantime,our calculations show that the economic performance in a few provinces has been restrained by the spatial development pattern with too high polycentric level.Secondly,there is a substitution effect between the polycentric structure and market integration,which mainly exists in small and medium-sized cities as well as eastern and central regions.Finally,distance between cities and transportation infrastructure acts non-linearly upon the effect of the polycentric structure on economic performance.This paper provides some empirical evidence and policy implications for the urban development pattern in China for the future.