It constructed a new economic geography model including travel time costs and trade costs of goods to explain the mechanism by which high-speed rail promotes knowledge spillover and thereby affects regional innovation disparities,and conducted empirical verification.With trade costs of goods constant,reducing travel time intensifies the spatial concentration of innovation factors,and the regional innovation gap is narrowed due to the knowledge spillover effect of high-speed rail.Empirical results indicate that high-speed rail significantly enhances regional innovation performance,but also widens the innovation gap between cities connected by high-speed rail,making it a major source of overall regional innovation disparities.Regionally,high-speed rail mainly widens the innovation gap within the high-speed rail city group in central and western regions,while in eastern regions,it reduces the contribution of the intra-group innovation gap to the overall disparity;high-speed rail mainly widens the contribution of small and medium-sized cities to the regional innovation gap.Furthermore,reducing the trade costs of goods strengthens the impact of high-speed rail on regional innovation,demonstrating the synergistic effect of different types of transportation infrastructure on regional innovation disparities.It has implications for improving the efficiency of innovation resource allocation under the high-speed rail network,promoting coordinated regional development,and collaboratively advancing the integration of goods and innovation factors between regions in the context of a unified national market.
high-speed railwayknowledge spilloverregional innovation gapspatial economic model
NETL
NSTL
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