长三角地区数字经济发展对城市间经济差距的影响研究——基于“中心—外围”视角的分析

Research on the impact of digital economy development on the economic gap between central and peripheral cities in Yangtze River Delta Region:Analysis based on the perspective of center-periphery

基于我国长三角地区41个城市2011-2020年的面板数据,采用双向固定效应回归方法实证检验数字经济发展对中心城市与外围城市间经济差距的影响及作用机制。研究发现,整体来看,在长三角地区,数字经济发展有利于缩小中心城市与外围城市之间的经济差距。在这一过程中,改善要素错配是重要的作用路径。异质性分析结果显示,相比于产业结构升级水平较低和人力资本水平较低的城市,数字经济发展对产业结构升级水平较高和人力资本水平较高城市的积极作用更加显著。同时,数字经济发展对“宽带中国”试点城市的作用程度也明显强于非试点城市。此外,拓展性研究结果显示,数字经济发展对中心城市与外围城市间经济差距的影响存在显著的倒“U”型特征。进一步对拐点进行计算发现,在长三角地区,仍有一些城市位于曲线左侧,数字经济发展水平较低,未能对中心城市与外围城市间经济差距发挥积极的缩减效应。基于此,提出加强数字基础设施建设、持续优化要素市场配置机制、积极推进产业结构升级、提高人力资本水平等政策建议。

Based on the panel data of 41 cities in the Yangtze River Delta from 2011 to 2020,using two-way fixed effects regression analysis,this paper empirically examined the impact and mechanism of the digital economy on the economic gap between central and peripheral cities.The results show that in the Yangtze River Delta region,the development of digital economy is conducive to narrowing the economic gap between central and peripheral cities.In this process,improving factor mismatch is an important path of action.The study shows that,overall,in the Yangtze River Delta,the development of the digital economy is conducive to narrowing the economic gap between central and peripheral cities.In this process,improving factor mismatch is an important path of action.The heterogeneity analysis results show that compared to cities with lower levels of industrial structure upgrading and human capital,the positive effect of digital economy on cities with higher levels of industrial structure upgrading and human capital is more significant.At the same time,the effect of digital economy on the pilot cities of“Broadband China”is significantly stronger than that of non-pilot cities.In addition,the results of the extended study show that the impact of digital economy on the economic gap between central and peripheral cities exhibits a significant inverted“U”shape.Further calculation of the inflection point shows that in the Yangtze River Delta,there are still some cities on the left side of the curve,with a lower level of digital economy development,which fails to positively reduce the economic gap between central and peripheral cities.Based on this,this study provides policy recommendations to strengthen the construction of digital infrastructure,continuously optimize the allocation mechanism of the factor market,actively promote the upgrading of industrial structure and improve the level of human capital.