华东经济管理

数字经济是推动长三角新旧动能转换的重要力量。文章基于2011年、2015年和2019年长三角数字经济联系强度，运用社会网络分析法、QAP分析法对长三角数字经济网络结构特征及影响因素进行分析。研究表明：长三角数字经济网络密度呈现“倒U”型变化，各城市之间联系较稀疏，但网络结构较稳定，数字经济资源有从长三角东南部向中部聚集的态势；发挥数字经济辐射作用的城市主要集中于沪苏浙，其对数字经济资源的控制能力较强；凝聚子群经历了先分化后整合的过程，子群内部城市具有地理邻近性；城市经济发展水平、信息化水平、产业结构和科技创新水平的差异以及各城市间是否相邻是影响长三角数字经济网络结构的重要因素。

The digital economy is an important force to promote the transformation of new and old driving forces in the Yangtze River Delta. Based on the connection strength of digital economy in the Yangtze River Delta in 2011,2015,and2019,this paper analyzes the structural characteristics and influencing factors of digital economy network in the Yangtze River Delta using social network analysis and QAP analysis. The research shows that the density of digital economy network in the Yangtze River Delta presents an“inverted U”type change. The connection between cities is sparse,but the network structure is relatively stable. The digital economy resources have gathered from the southeast to the middle of the Yangtze River Delta;the cities that play the role of digital economy radiation are mainly concentrated in Shanghai,Jiangsu,and Zhejiang,which have strong control over digital economic resources;agglomerated sub groups have experienced the process of differentiation before integration,and the cities within the sub groups have geographical proximity;the difference of urban economic development level,informatization level,industrial structure,and scientific and technological innovation level,and whether cities are adjacent are important factors affecting digital economy network structure in the Yangtze River Delta.