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Abstract
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Under the dual background of innovative city construction and innovation-driven development, the urban innovation system has received extensive attention. However, there are few in-depth studies on urban collaborative innovation between subjects and cities. Based on the triple helix(TH) theory and innovation network theory, this study constructs the theoretical framework of the urban collaborative innovation system from two aspects: the collaboration between innovation subjects and the spatial correlation between cities. Empirically examined the rule characteristics, evolution trend, and synergetic degree of the urban innovation system in China. The results show that: (1) Inter-city innovation cooperation has evolved from a “dual-core driven” network structure to a “multi-center driven” network structure. (2) There are specific substitution and crowding-out effects between industry-university collaboration and industrygovernment collaboration. (3) The inter-city correlation of urban agglomeration is prominently better than that of other regions. The intercity tight-subject tight cities are the most critical category of collaborative innovation. The research results provide theoretical sustenance and policy enlightenment for precisely holding the development law of China's urban innovation system and coordinating the relationship between different subjects and cities in collaborative innovation.
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