基于DID模型的中老铁路开通对沿线城市商贸流通产业集聚的影响研究OA

As a landmark project of the"Belt and Road Initiative",the China-Laos Railway is an important driving force to promote the spatial optimization of the commercial circulation industry in cities along the line.Based on the panel data of eight cities/autonomous prefectures in Yunnan Province from 2018 to 2023,the DID model was adopted to systematically identify the impact of the China-Laos Railway opening on the industrial agglomeration of commercial circulation in cities along the line and its transmission path.The results show that under the condition of satisfying the parallel trend,the China-Laos Railway opening significantly improves the industrial agglomeration level of commercial circulation in cities along the line,and this conclusion remains valid after a series of robustness tests.The mechanism test shows that the promoting effect of the China-Laos Railway on agglomeration is mainly realized through market potential and market accessibility;the heterogeneity analysis shows that the agglomeration effect is particularly significant in small and medium-sized cities,border cities,and transport-disadvantaged cities.The research provides empirical evidence for transport infrastructure driving regional industrial agglomeration under the"Belt and Road Initiative",which helps to differentially promote the optimization of regional industrial layout along the China-Laos Railway and enhance the driving effect of the corridor economy.