【摘要】 为探讨绿色技术创新和数字经济发展如何协同推动经济绿色增长,本文构建了包含绿色技术创新和数字化转型的一般均衡模型,并结合中国城市层面的现实数据,从经济增长和碳排放两个方面,分析了数字经济发展协同绿色技术创新对经济绿色增长的影响效果以及作用机制.研究发现:1)绿色技术创新对经济增长和碳排放具有“U”型影响效果,即在超过特定的技术创新水平门槛后,随着绿色技术创新水平的不断上升,经济增长速度会不断提升,碳排放会持续降低,而数字经济发展会强化绿色技术创新的影响,产生更陡峭的“U”型影响. 2)数字经济发展同时具备中介效应和调节效应.绿色技术创新对数字经济发展存在正“U”型影响,即绿色技术创新的提高对数字经济发展具有推动作用.而数字经济发展又会进一步调节绿色技术创新在经济增长和降低碳排放上的作用,加强绿色技术创新对经济绿色增长的正向作用. 3)数字经济发展增强了绿色技术创新对绿色全要素生产率的影响是数字经济发展协同绿色技术创新推动经济绿色增长的主要机制. 4)促进数字经济发展的政策需要搭配更强的碳税,虽然存在短期经济成本,但是在长期经济增长和环境质量上都存在优势.本研究将经济发展的绿色转型问题与数字化转型问题联合研究,为协同推进经济绿色化、数字化转型保障经济稳定增长提供了重要的理论依据.更多还原

【Abstract】 In order to explore how green technology innovation and the development of the digital economy can jointly promote green economic growth, this paper constructs a general equilibrium model that includes green technology innovation and digital transition. Combining with the real-world data at the city level in China, from the two aspects of economic growth and carbon emissions, it analyzes the impact and the mechanism of action of the digital economy collaborating with green technology innovation on green economic growth. It found that: 1) Green technology innovation has a “U-shaped” impact on economic growth and carbon emissions. That is,after exceeding a specific threshold of technological innovation level, with the continuous increase in the level of green technology innovation, the economic growth rate will continuously increase, and carbon emissions will continue to decrease. Moreover,the development of digital economy will strengthen the impact of green technology innovation, resulting in a steeper “U-shaped” relationship. 2) The development of economic digitalization has both mediating and moderating effects. Green technology innovation has a positive “U-shaped” impact on the development of the digital economy. That is, an increase in green technology innovation can promote the development of digital economy. In turn, the development of digital economy further moderates the impact of green technology innovation on economic growth and carbon emission reduction, strengthening the positive effect of green technology innovation on green economic growth. 3) The digital economy’s enhancement of the impact of green technology innovation on green total factor productivity is the primary mechanism by which the digital economy, in collaboration with green technology innovation, drives green economic growth. 4) Policies to promote the development of economic digitalization need to be accompanied by higher carbon taxes. Although there are shortterm economic costs, there are advantages in terms of long-term economic growth and environmental quality. This research combines the study of the green transition of economic development with that of digital transition, providing crucial theoretical support for the coordinated advancement of the green and digital transition of the economy to ensure stable economic growth.更多还原