交通可达性对城市经济高质量发展的异质性影响

Heterogeneous Impact of Traffic Accessibility on High-quality Development of Urban Economy

在推进高质量发展的背景下,探究交通可达性提升对城市经济高质量发展的异质性影响有重要意义。本文基于278个城市面板数据,采用Meta-RDM模型测度中国城市全要素生产率,将其作为衡量城市经济高质量发展的指标,并采用SARAR模型验证了可达性提升对不同层级城市高质量发展的影响路径差异。研究发现:城市间交通可达性提升会促进城市全要素生产率提升,但作用路径不同;可达性对普通城市高质量发展的影响是通过提升产业集聚及产业结构水平,进而提升技术进步来实现的;可达性对中心城市高质量发展的影响是通过促进资本要素及劳动力要素的流动和配置进而提升技术效率值来实现的。另外,财政支出占比指标会显著影响城市的全要素生产率,但不利于普通城市的技术效率提升,不利于中心城市的技术进步。在交通可达性提升的背景下,不同层级城市应有不同的全要素生产率提升策略。

In the context of promoting high-quality development,it is of great significance to explore the heterogeneous impact of improving traffic accessibility on the high-quality development of urban economy.Based on the 278 urban panel data,this paper uses the Meta-RDM model to study China's urban total factor productivity(TFP)by measuring the high-quality development of urban economy,and uses the SARAR model to verify the paths of accessibility improvement on the high-quality development of different levels of cities.It is found that:the improvement of inter-city traffic accessibility will promote the improvement of urban total factor productivity,but the paths are different;the impact of accessibility on the high-quality development of ordinary cities is achieved by upgrading the level of industrial agglomeration and industrial structure,and then enhancing the value of technological progress;the impact of accessibility on the high-quality development of central cities can be achieved by promoting the flow and allocation of capital factors and labor factors,and then enhancing the value of technological efficiency.Moreover,the proportion of fiscal expenditure will significantly affect the total factor productivity of cities,but it is not conducive to the technical efficiency of ordinary cities and the technological progress of central cities.This paper argues that under the background of accessibility improvement,different levels of cities should have different TFP promotion strategies.