城市群绿色技术创新的空间网络结构特征及其效应研究——以成渝地区双城经济圈为例

Research on Spatial Network Structure Characteristics and Effects of Green Technology Innovation in Urban Agglomeration:Take Chengdu-Chongqing Economic Circle as an Example

通过构建绿色技术创新水平评价指标体系,剖析2006~2019年成渝地区双城经济圈绿色技术创新的时空演化趋势,并结合社会网络分析法和空间面板模型,揭示绿色技术创新空间网络的结构特征及其效应。研究发现:经济圈绿色技术创新水平波动上升,空间“辐射效应”逐步凸显。绿色技术创新网络结构由“双核心”向“多核心”转变,空间网络趋于紧密和稳定。成都和重庆处于网络核心地位,是主要溢出城市和中心行动者;德阳、绵阳、宜宾主要承担着“桥梁”和“中介”作用。经济圈板块间联系密切,绿色技术创新的空间溢出主要以板块内溢出为主。整体网密度和城市节点中心性显著提升了城市绿色技术创新水平,接近中心度的正向效应最为突出。

This study analyzes the space-time evolution trend of green technology innovation in Chengdu-Chongqing economic circle from 2006 to 2019 by constructing the evaluation index system, which combines with SNA method and SARAR model to reveal the network structure characteristics and effects of spatial correlation of green technology innovation. The results show that: the level of green technology innovation in the economic circle fluctuates and rises, and the spatial “radiation effect” is gradually highlighted. The network structure of green technology innovation has changed from “dual-core” to “multi-core, ” and the spatial network has become closer and more stable. Chengdu and Chongqing are at the core of the network and are the main spillover cities and central actors;Deyang, Mianyang, and Yibin mainly play the role of “bridge” and “intermediary.” The economic circle is closely connected between plates, and the spatial spillover of green technology innovation is mainly intra plate spillover. The overall network density and the centrality of urban nodes have significantly improved the level of urban green technology innovation, and the positive effect of proximity to centrality is the most prominent.