长三角城市技术创新网络的时空演化与影响机制

Spatio-temporal evolution and influential mechanism of intercity technological innovation networks in the Yangtze River Delta

在创新转型和流动空间下,创新网络及其邻近性机制成为城市地理学的热点议题,但学者们主要考察多维邻近性对创新网络静态和独立的影响。基于国家知识产权局的联合申请专利数据,构建2011年和2019年长三角41个城市之间的技术创新网络,在结构演化分析的基础上,通过负二项回归揭示多维邻近性对城际技术合作创新影响的动态性与交互性,并采用分组回归检验虚拟变量的调节效应。结果发现:(1)2011—2019年长三角城市技术创新网络密度增加、规模扩大,但合作强度集中在高能级城市核心区,整体表现为以省会为核心、省界为边界的辐射结构。(2)城市的专利授权数和行政等级能促进城际合作,而省界会起阻碍作用,不同维度邻近性的影响各异。(3)社会邻近性与城际合作强度呈倒U型关系,过度的社会邻近将阻碍合作;制度与文化邻近对地理邻近起正向调节作用;而社会邻近对地理邻近具有替代效应。

In the context of innovation transformation and space of flows,innovation networks and their proximity mechanism were hot topics in urban geography.However,scholars mainly examined the static and independent effects of multidimensional proximity on innovation networks.Drawing on co-patent application data among 41 cities in the Yangtze River Delta(YRD),this paper constructed intercity technological innovation networks in 2011 and 2019.Based on the analysis of structural evolution,this paper employed negative binomial regression to explore the dynamics and interaction of multidimensional proximity underlying the intercity technological collaboration in the YRD and used grouping regression to test the moderating effects of dummy variables.The results showed that:①The density and scale of intercity technological innovation network in the YRD increased from 2010 to 2019,but the intensity of the network concentrated in the core area among cities with high administrative levels,presenting a hub-and-spoke structure bounded by provinces and centered on provincial capitals.②The city’s granted patents and administrative level could promote intercity collaboration,while provincial boundary acted as a barrier.The impacts of multidimensional proximity were different.③There existed an inverted U-shaped relationship between social proximity and intercity collaboration,suggesting that excessive social proximity would hinder intercity collaboration.Institutional and cultural proximity had a positive mediating effect on geographic proximity,whereas social proximity could substitute geographic proximity.