School of Economics and Management, Tongji University, Tongji Building A, Siping Road 1500, Shanghai, 200092, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Apr;30(19):56284-56302. doi: 10.1007/s11356-023-26297-7. Epub 2023 Mar 14.
Improving carbon productivity is an important measure to promote low-carbon development. Since high-speed rail (HSR) has both economic and environmental effects, it is particularly important to clarify the relationship between HSR development and carbon productivity. In this paper, 285 cities in China from 2007 to 2017 are used as a research sample, and the relationship between the opening of HSR and the city's carbon productivity is studied using the spatial difference-in-difference method (SDID). The result shows that due to the intermediary effect of technological innovation and industrial structure, the opening of HSR significantly increases urban carbon productivity. At the same time, this influence has a significant positive spatial spillover effect. On average, when a city opens HSR, the local carbon productivity increases by 5.18%, and the carbon productivity of its neighboring cities increases by 13.52%. Overall, the positive effect of HSR on carbon productivity is more pronounced in the middle and western regions. However, the spatial spillover effect in the eastern region is significantly negative. These findings help to accurately assess the social benefits of HSR network expansion and provide important decision-making references for climate governance in the HSR era.
提高碳生产力是促进低碳发展的重要措施。由于高速铁路 (HSR) 具有经济和环境效应，因此明确 HSR 发展与碳生产力之间的关系尤为重要。本文以 2007 年至 2017 年的 285 个城市为研究样本，利用空间双重差分法（SDID）研究了 HSR 开通与城市碳生产力之间的关系。结果表明，由于技术创新和产业结构的中介效应，HSR 的开通显著提高了城市的碳生产力。同时，这种影响具有显著的正向空间溢出效应。平均而言，当一个城市开通 HSR 时，当地的碳生产力提高了 5.18%，其邻近城市的碳生产力提高了 13.52%。总体而言，HSR 对碳生产力的积极影响在中部和西部地区更为明显。然而，东部地区的空间溢出效应则显著为负。这些发现有助于准确评估 HSR 网络扩展的社会效益，并为 HSR 时代的气候治理提供重要的决策参考。
