摘要
Abstract
In the new stage where the digital economy empowers high-quality development,the imbalance be-tween urban-rural and inter-regional development remains a key obstacle to common prosperity.Whether digital in-frastructure,as a core carrier for optimizing resource allocation and breaking development barriers,can serve as an endogenous driver of common prosperity has become a focus of attention among policymakers and academics.
This study constructs a quasi-natural experiment based on the"Broadband China"pilot policy to systematically explore the impact of digital infrastructure on common prosperity and its underlying logic.The results show that this policy significantly promotes common prosperity in pilot cities,which has passed multiple robustness tests.The mechanism analysis shows that virtual agglomeration is the core link through which digital infrastructure empowers common prosperity.The high-speed information exchange and cross-regional factor circulation platform built by dig-ital infrastructure breaks the geographical constraints of traditional industrial agglomeration and promotes the trans-formation of industries towards virtual agglomeration.This model not only avoids the congestion effects of traditional agglomeration but also strengthens the endogenous driving force of regional economy through the efficient spillover of knowledge.Meanwhile,the capital and labor factor distortion has a significant negative moderating effect on virtual agglomeration:When factor allocation deviates from the optimal state,it exacerbates information asymmetry,there-by weakening the role of virtual agglomeration;whereas the improvement of the factor market can further amplify the economic dividends of virtual agglomeration.
Heterogeneity analysis indicates that the promoting effect of digital infrastructure on common prosperity is more significant in cities with higher administrative levels,well-developed digital inclusive finance,and high market in-tegration.In terms of spatial effects,the"Broadband China"pilot policy not only promotes local common prosperi-ty but also generates positive spillover effects on neighboring cities.However,with the increase in distance,its driving effect gradually weakens.Within the range of 150-300 km,the policy effect shifts from"spillover effect"to"siphon effect".This phenomenon may be caused by the attenuation of digital infrastructure radiation with dis-tance,as well as the combined effects of inter-regional economic competition and resource siphoning.
The conclusions provide theoretical support for the driving role of digital infrastructure in regional common prosperity,and offer important city-level evidence for optimizing the spatial layout of digital infrastructure and pro-moting coordinated regional development.Therefore,this paper puts forward suggestions including overall planning of digital infrastructure layout,breaking down barriers in the factor market,strengthening policy coordination,and preventing digital economic risks.These suggestions provide a decision-making basis for optimizing the layout of digital infrastructure,stimulating endogenous growth,and narrowing the digital divide in the new development stage,thereby contributing to the achievement of the goal of common prosperity.关键词
数字基建/虚拟集聚/共同富裕/要素错配/空间溢出效应Key words
digital infrastructure/virtual agglomeration/common prosperity/factor misallocation/spatial spillover effect分类
管理科学
