作为一种新型的经济业态,数字经济具有三大特点:技术、创新,节能环保。作用于国民经济的各个部门,这有利于提高碳排放效率,对实现中国的碳峰值和碳中和两大目标具有重要意义。首先,数字经济对碳排放效率影响机理的理论分析,提出关于直接影响的研究假设,中介效应,数字经济对碳排放效率的空间效应。其次,基于2011-2020年中国279个城市的面板数据,构建计量模型,调解,数字经济对碳排放效率的空间效应。结果表明:1)数字经济可以提高碳排放效率;2)数字经济对碳排放效率的影响呈“U”形关系,这与“环境库兹涅茨曲线”假设一致;3)数字经济对碳排放效率的影响存在于城市异质性中,具体表现为区域异质性和城市规模异质性;4)技术创新是数字经济中提高碳排放效率的重要中介,在数字经济中促进技术创新可以提高碳排放效率;5)数字经济对碳排放效率具有空间效应,从而提高周边城市的碳排放效率。最后,基于上述结果,从三个方面提出了建议:推动数字经济重要产业和重点领域深耕碳排放,强调数字经济发展的区域平衡,加强数字经济发展的区域合作,继续发挥数字经济对提高碳排放效率的积极作用。
As a new type of economic format, digital economy has three major characteristics: technical, innovative, energy-saving and environmentally friendly. Acting on various sectors of the national economy, it is beneficial for improving carbon emission efficiency and is of great significance for achieving China\'s two major goals of carbon peak and carbon neutrality. Firstly, theoretical analysis of the impact mechanism of digital economy on carbon emission efficiency, proposing research hypotheses on the direct effect, mediating effect, and spatial effect of digital economy on carbon emission efficiency. Secondly, based on panel data from 279
cities in China from 2011 to 2020, the econometric models are constructed to empirically analyze the direct, mediating, and spatial effects of digital economy on carbon emission efficiency. The results show that: 1) Digital economy can improve carbon emission efficiency; 2) The impact of digital economy on carbon emission efficiency has a \"U\"-shaped relationship, which is consistent with the \"Environmental Kuznets Curve\" hypothesis; 3) The impacts of digital economy on carbon emission efficiency exist in urban heterogeneity, specifically manifested as regional heterogeneity and urban scale heterogeneity; 4) Technological innovation is an important mediator for improving carbon emission efficiency in digital economy, and promoting technological innovation in digital economy can improve carbon emission efficiency; 5) Digital economy has spatial effect on carbon emission efficiency, which can improve the carbon emission efficiency of neighboring
cities. Finally, based on the above results, suggestions are proposed from three aspects: promoting important industries and key areas for deep cultivation of carbon emission in digital economy, emphasizing regional balance in the development of digital economy, and strengthening regional cooperation in the development of digital economy, in order to continue to play a positive role in improving carbon emission efficiency through digital economy.