数字经济空间关联网络的产业结构变迁效应研究——基于网络节点中心性分析视角

Research on the effect of industrial structure change of spatial correlation network of digital economy: based on the analysis of network centrality

准确刻画数字经济空间关联网络特征并探讨其产业结构变迁效应,对于凝聚数字经济发展合力和扩大其对产业结构变迁的网络溢出效应具有重要的参考价值。基于网络节点中心性分析视角,实证探讨了数字经济空间关联网络的产业结构变迁效应。研究发现:(1)我国城市数字经济已呈现显著的整体网络发展格局,但从网络节点中心性来看,仍存在显著的空间差异,其由高到低表现为“东部地区—中西部地区”“四大核心城市群—非四大核心城市群”“中心城市—周边外围城市”的分布规律。(2)网络节点中心性的提高显著促进了产业结构合理化、高级化,且该结论在考虑内生性问题及稳健检验后依然成立。(3)网络节点中心性对产业结构变迁的正向促进作用存在显著的异质性:从地区差异来看,东部地区更能通过提高网络节点中心性显著促进产业结构变迁;从所属城市群区域来看,“四大核心城市群”网络节点中心性的产业结构变迁效应更加突出;从城市规模来看,大规模城市更能显著发挥数字经济网络的正外部性以加快产业结构变迁的步伐。

Accurately describe the characteristics of the spatial correlation network of digital economy and discussing its effect of industrial structure change has important reference value for condensing the resultant force of digital economy development and further expanding its network spillover effect on the change of industrial structure. Based on the analysis of the centrality of network, this paper empirically discusses the industrial structure change effect of the spatial correlation network of digital economy. The research finds that: First, China’s urban digital economy has presented a significant overall network development pattern, but from the perspective of network centrality, there are still significant spatial differences, which are reflected in the distribution law of “eastern region-central and western regions” “four core city clusters-non four core city clusters” and “central cities-peripheral cities” from high to low. Second, the improvement of the centrality of network has significantly promoted the rationalization and upgrading of industrial structure, and the conclusion is still valid after considering the endogenous problem and robust test. Third, there is significant heterogeneity in the positive role of network centrality on industrial structure change. From the perspective of regional differences, the eastern region can significantly promote the change of industrial structure by improving the centrality of network;From the perspective of the urban agglomeration region, the industrial structure change effect of the network centrality of the “four core urban agglomerations” is more prominent;From the perspective of city size, large-scale cities can significantly play the positive externality of digital economic network to accelerate the pace of industrial structure change.