城市层级体系是技术等级系统的空间映射,创新网络的形成过程也是创新核心发挥辐射作用、构建城际创新空间关联的相互作用过程,显著影响城市群系统创新能力的提升。选取长三角城市群2005-2016年面板数据,从空间、技术、经济三个维度,探寻邻近性作用于城市群创新系统的路径,及不同等级创新核心作用的异质性。结果显示：邻近性对城市群创新能力提升具有显著影响,空间邻近、技术邻近、经济邻近发挥不同作用,形成对创新溢出效应强度与方向的差异化影响。因此,应从完善基础设施网络、提升城市群创新政策协调性等方面拓展邻近效应作用空间,促进城市群协同发展。

The urban hierarchy system is the spatial mapping of the technical hierarchy system. The formation process of the innovation network is the interaction process that the radiation effect of innovation centers and the construction of inter-city innovation spatial correlation between cities. It has a significant impact on the improvement of the innovation ability of urban agglomeration. This paper selects the panel data of Yangtze River Delta Mega-city Region from 2005 to 2016, and divides the distance factors into three dimensions: spatial distance, technical distance, and economic distance. It explores the path of proximity effect on the innovation system of urban agglomerations and explores the different role of innovation centers at different hierarchy rank. The results show that the proximity effect has a significant impact on the improvement of the innovation capacity of urban agglomeration. The significance of spatial proximity, technological proximity, and economic proximity is different, which forms a differential effect on the intensity and direction of innovation spillover effects. Therefore, to expand the role of proximity effect, the paper puts forward the countermeasures from the aspects of improving the infrastructure network and optimizing the coordination of innovation policy in urban agglomeration, so as to promote the synergetic development of urban agglomerations.

国家自然科学基金青年项目“城市群协同创新系统绩效评价研究”(71603133)；教育部人文社会科学研究项目“医药制造业创新技术溢出、吸收能力及其对产出效率的影响研究”(15YJA630031)