Abstract
Based on the panel data of 247 prefecture-level and above cities in China from 2006 to 2016, this paper establishes a spatial Dubin model (SDM) to study the spatial spillover effect and mechanism of the improvement of inter-city accessibility caused by high-speed rail on urban innovation capabilities. The study found that the improved accessibility of high-speed rail improves the city's innovation capabilities as a whole, and has a significant positive spillover effect on neighboring cities. In the sub-sample regression of Tier 1 to Tier 5 cities of different scales, the spatial spillover effect of high-speed rail accessibility on urban innovation capabilities is the most significant in Tier 1 and Tier 5 cities. The text further construct the provincial-inverse distance nested spatial weight matrix to discuss the impact of administrative divisions on urban innovation, and find that the innovation factors within the province are more mobile.
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