【摘要】 共建低碳发展机制、共同应对气候变化是中国参与国际合作的重要举措。而境外经贸合作区作为中国对外开放的新窗口，其能否对东道国碳减排产生积极影响备受关注，关乎后续合作的顺利开展。文章基于中国境外合作区实践，采用双重差分等方法，系统考察了合作区对东道国碳排放强度的影响及机制。研究发现，设立合作区能够显著降低东道国碳排放强度，而低碳产品进口使用、能源效率提高与结构优化、绿色全要素生产率提升是合作区发挥降碳效应的重要路径。异质性分析表明，合作区在初始碳排放强度较高、环保税较低、中等收入国家具有更为显著的降碳效应；且通过确认考核的合作区，民企投资的合作区以及轻工业、物流、综合合作区降碳能力更强。此外研究发现，合作区设立不仅能在经济发展和减排方面实现协同增效，还能通过与“一带一路”建设深度结合，共同助力全球气候治理。文章结论为中国携手世界实现经济发展与环境保护“双赢”提供了经验证据，亦为下阶段全球碳污染治理提供政策启示。更多还原

【Abstract】 Jointly building a low-carbon development mechanism and jointly addressing climate change are important measures for China’s international cooperation. As overseas economic and trade cooperation zones(COCZ) serve as a new window for China’s opening up, whether it can have a positive impact on host countries’ carbon emission reduction has attracted much attention and is related to the smooth development of subsequent cooperation. Based on the practice of China’s COCZs, this paper uses double difference method to systematically examine the impact and mechanism of COCZs on the carbon emission intensity of host countries. This study found that the establishment of COCZs has significantly reduced the carbon emission intensity of the host country. The import of low-carbon products, energy efficiency improvement, energy structural optimization, and green total factor productivity improvement are the main ways for COCZs to exert its carbon reduction effect. Heterogeneity analysis shows that the carbon reduction effect of COCZs may be more significant in middle-income countries or in the ones with higher initial carbon intensity or lower environmental taxes; COCZs that have passed the confirmation assessment, COCZs which are invested by private enterprises, as well as light industry, logistics, and comprehensive COCZs have more significant carbon reduction effects. In addition, the establishment of COCZs can not only achieve synergistic efficiency in economic development and emission reduction, but also jointly contribute to global climate governance through in-depth integration with the construction of the "Belt and Road".The conclusion of this paper provides empirical evidence for China to join hands with the world to achieve a "win-win" of economic development and environmental protection, and also provides policy inspiration for global carbon pollution control in the next stage.更多还原