摘要
数字经济是推动城市低碳转型的重要动力,也是实现碳达峰、碳中和目标的关键路径.该研究以中国276个地级及以上城市为研究对象,利用改进的熵值法测算各城市数字经济发展水平,并将碳排放绩效分解为碳排放强度和碳排放效率,在此基础上综合运用面板固定效应模型和中介效应模型剖析数字经济对碳排放绩效的影响及其作用机制.结果表明:①数字经济发展水平每提高1%,碳排放强度将显著下降0.180%,碳排放效率将显著提高0.276%,即数字经济能显著提高碳排放绩效.②数字经济对碳排放绩效的影响存在城市区位和城市规模的异质性,东部城市和大城市数字经济的作用强度更大.③数字经济可通过提高经济发展水平、优化产业结构以及加速技术创新显著提高碳排放绩效.研究显示,数字经济不仅能直接显著提升碳排放绩效,而且可通过规模效应、结构效应和技术效应间接影响碳排放绩效.因此,未来仍需加快数字经济高质量发展,尤其增强科技创新和产业升级对碳排放绩效的传导作用;同时根据城市规模和资源禀赋,建立健全的差异化碳减排机制.
The digital economy is an important driving force to promote urban low-carbon transformation,and it is also a key path to achieve the goal of carbon peaking and carbon neutrality.This study takes 276 cities at prefecture level and above in China as the research object,uses the improved entropy method to measure the development level of the digital economy in each city,and divides the carbon emission performance into carbon emission intensity and carbon emission efficiency.On the basis,the panel fixed effect model and mediation effect model are comprehensively used to analyze the impact of digital economy on carbon emission performance and its mechanism.The results show that:(1)For every 1%increase in the development level of digital economy,carbon emission intensity will be significantly reduced by 0.180%,and carbon emission efficiency will be significantly increased by 0.276%,that is,digital economy can significantly improve the carbon emission performance.(2)The impact of digital economy on carbon emission performance is heterogeneous in city location and city size,and the effect of digital economy is greater in the eastern cities and megacities.(3)Digital economy can significantly enhance carbon emission performance by raising the level of economic development,optimizing industrial structure and accelerating technological innovation.The research shows that the digital economy can not only significantly boost carbon emission performance directly,but also indirectly affect carbon emission performance through scale effect,structure effect and technology effect.Therefore,it is still necessary to expedite the high-quality development of digital economy,especially to strengthen the transmission effect of technological innovation and industrial upgrading on carbon emission performance.At the same time,a differentiated carbon emission reduction mechanism needs to be established and improved based on city size and resource endowment.
作者
王凯
关锐
胡鸣镝
李娴
甘畅
WANG Kai;GUAN Rui;HU Mingdi;LI Xian;GAN Chang(College of Tourism,Hunan Normal University,Changsha 410081,China;School of Management,Wuhan Polytechnic University,Wuhan 430048,China)
出处
《环境科学研究》
CAS
CSCD
北大核心
2023年第9期1824-1834,共11页
Research of Environmental Sciences
基金
湖南省自然科学基金项目(No.2022JJ30392)
湖南省国内一流培育学科建设项目(No.5010002)。
关键词
数字经济
碳排放绩效
碳排放强度
碳排放效率
中介机制
digital economy
carbon emission performance
carbon emission intensity
carbon emission efficiency
mediation mechanism
