【摘要】 优化供应链空间网络布局，对畅通经济大循环、提升供应链安全和韧性水平至关重要。在数字经济背景下，如何利用数字技术提升供应链安全水平成为亟待破解的重要课题。然而，受信息不对称和制度性壁垒的制约，企业难以实现高效的供应链布局。鉴于此，本文利用文本分析法刻画地级市数字治理水平，考察2009—2022年中国各城市数字治理水平提升对核心企业在本地进行供应链布局的影响。研究发现，地区数字治理水平会增加核心企业在该地布局供应商的数量，实现供应链稳链和扩链，这一效应主要通过降低信息搜寻成本、提升企业投资者关注度和改善营商环境来实现。在同等数字治理水平下，核心企业在省会城市和非省会城市间的供应商布局差距因“虹吸效应”和“追赶效应”先增大后缩小。此外，考虑到供应链运行成本，企业最优的供应链布局范围约1200千米，但高铁开通扩大了最优的供应链布局范围，而且核心企业会以设立子公司的方式布局供应链。从数字治理各维度看，数据跨境流动、数据安全与风险和数据开放共享治理均能够促进核心企业增加布局供应商的数量。本研究从数字治理角度为优化供应链布局、畅通经济循环探索新抓手提供新参考。更多还原

【Abstract】 Optimizing the spatial network layout of supply chains is of vital importance for facilitating the smooth circulation of the domestic economy and enhancing the security and resilience of supply chains. In the context of the digital economy, how to employ technological capabilities to improve supply chain security has become a critical issue that urgently requires resolution. However, constrained by information asymmetry and institutional barriers, firms continue to face high costs in searching across regions for suitable suppliers, which makes it difficult for them to achieve efficient cross-regional supply chain layout. In view of this, based on prefecture-level government reports and relevant legal and institutional documents, this paper employs text analysis to characterize the level of digital governance in prefecture-level cities and examines the impact of improvements in urban digital governance on the local supply chain layout of core firms across Chinese cities during 2009-2022. The findings show that higher levels of regional digital governance significantly increase the number of suppliers deployed by core firms in a given locality, thereby contributing to both supply chain stabilization and supply chain expansion. This effect is mainly realized through three channels: reducing information search costs, increasing investor attention to firms, and improving the business environment. Furthermore, on the basis of the information-search-cost-reducing effect generated by digital governance, firms are able not only to search for suitable suppliers across cities within the same province, but also to expand supply chain layout more intensively toward cities outside the province. Under the same level of digital governance, there exists an asymmetric gap between provincial capital cities and non-provincial-capital cities in the supplier layout of core firms, and this gap first widens and then narrows with the emergence of the siphon effect and the catch-up effect. In addition, due to the existence of supply chain operating costs, even when information search costs decline, core firms still tend to deploy suppliers within a range of approximately 1200 kilometers from the focal firm. Nevertheless, the opening of high-speed rail further expands the geographical scope of supplier deployment, thereby strengthening the spillover effect of core firms on the economic development of surrounding areas. Moreover, core firms tend to undertake supply chain layout through the establishment of subsidiaries, so as to place the supply chain under the control of the focal firm or the business group, thereby enhancing the security of supply chain layout. From the perspective of the various dimensions of digital governance, governance over cross-border data flows, data security and risk, and data openness and sharing can effectively increase the number of suppliers deployed by core firms. From the perspective of digital governance, this study explores new policy instruments for optimizing supply chain layout and facilitating economic circulation, and provides new references for policy decision-making.更多还原