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
Research on Impact of China-Laos Railway Opening on Industrial Agglomeration of Commercial Circulation in Cities along Railway Line Based on DID Model
中老铁路作为“一带一路”倡议的标志性工程,是推动沿线城市商贸流通产业空间优化的重要驱动力。基于云南省8个州市2018—2023年的面板数据,采用DID模型,系统识别中老铁路开通对沿线城市商贸流通产业集聚的影响及其传导路径。研究发现,满足平行趋势条件下,中老铁路开通显著提高沿线城市商贸流通产业集聚水平,该结论在一系列稳健性检验后依旧成立。机制检验显示,中老铁路对集聚的促进作用主要通过市场潜能与市场可达性实现;异质性分析显示,集聚效应在中小型城市、边境城市及交通劣势城市尤为显著。研究为“一带一路”倡议下交通基础设施驱动区域产业集聚提供了经验证据,有助于差异化促进中老铁路沿线区域产业布局优化,提升通道经济带动效应。
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.
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国家自然科学基金项目(42461026)
国家自然科学基金项目(41661029)
云南省社会科学规划项目(YB2022025)
云南财经大学校级科研项目(2024H36)
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