| In recent years,the high-speed rail network has had a greater impact on the Chinese economy.People gradually realize that high-speed rail plays an important role in promoting regional integration and balanced development in China.Studying the impact of high-speed rail on regional development has become a hot issue of concern to all sectors of society.This paper attempts to analyze the impact mechanism of high-speed rail on the development of China's county from the microscopic level of national districts and counties,explore the rationality of high-speed rail construction,analyze the time efficiency,agglomeration effect and diffusion effect brought by high-speed railway construction.Insufficient,quantitative study on the impact of high-speed rail on districts and counties in different regions,different administrative levels,and different urban agglomerations will provide some guidance and reference for the further development of China's high-speed rail.Firstly,this paper constructs a network of high-speed railways in China's counties to study the effect of the opening of high-speed railways on the growth of regional integration.Based on the overall exponent method,this paper analyzes the effect of highspeed rail network construction on the accessibility of high-speed railways in all districts and counties in China.the average normalized centrality and accessibility are highest in the municipal districts of the eastern region,and the average normalized centrality is the lowest in the ordinary counties in the western region,which is in line with the distribution pattern of the high-speed railway stations.The average normalized accessibility of the Yangtze River Delta,Jing jin ji City Group,and Pearl River Delta urban agglomerations located in the eastern developed regions is highest,which is more than 300% higher than that of the most backward Chengyu City Group.On the basis of research approachability,the plump positive effect of high-speed rail on the growth of transportation is further analyzed,and the time and cost saved by each district/county is calculated through a production-cost model.Based on the factor analysis modus,the economic agglomeration index was calculated to study the effect of the agglomeration effect brought by the opening of the high-speed railway on the economic growth of the county.This paper finds that although the high-speed railway construction intensified the growth imbalance between the prefecture-level cities and the ordinary counties in the western region to a certain extent,the high-speed rail was not further developed.Finally,using the PSM-DID model,based on the panel data,the quantitative analysis of the effect of high-speed rail on county-level economic diffusion effects was performed.Then,the effects of traffic on different types of districts and counties were studied in depth under the administrative and subregional approaches.In addition,this paper studied seven major urban agglomerations in China,and the dedication of high-speed rail construction to the economic growth of the districts and counties was eventually found to be 26%.The dedication rate of high-speed rail construction to the economic growth of the municipal districts is 27%,the dedication rate of high-speed rail construction to county-level cities' economic growth is 22%,and the dedication of high-speed rail construction to ordinary county economic growth is 20%.The effect of high-speed rail construction on the GDP growth in the western regions and municipal districts is still not significant enough.. |
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