摘要
数字经济在重塑后疫情时期中国经济发展轨迹的同时,也深刻影响了中国的“双碳”进程。以智慧城市试点政策作为数字经济发展的代理变量,基于2006—2019年中国281个地级城市的面板数据,综合运用双重差分法、两阶段三步法和空间双重差分法,实证考察数字化赋能视角下智慧城市建设的碳减排效应。结果表明:(1)相比非试点城市,智慧城市的碳排放量平均降低了2.8%,即智慧城市建设显著降低了碳排放水平,此结论经更换估计模型、精选对照组等系列稳健性检验后依然成立。(2)机制研究表明,智慧城市建设促使城市发展由要素与投资驱动转向创新驱动,并通过数字赋能发挥能源升级效应、生活转型效应与资源配置效应,促进了城市低碳转型,机制量化分解结果显示这一机制贡献了超过80%的解释效果。(3)异质性分析表明,数字经济发展的碳减排效果在大型及以上规模城市以及人、财、物资源禀赋较高的城市更为明显。(4)空间效应分析表明,伴随距离阈值的增加,智慧城市建设所产生的溢出效应明显减少,且使用双重差分空间杜宾模型进行检验后该结论依旧成立。这一研究不仅为分析数字经济发展与碳排放治理的因果关系提供了新的文献证据,对后疫情时期如何运用数字经济赋能绿色低碳转型、进而实现经济高质量发展亦具有重要实践意义。
While reshaping China's economic development trajectory in the post-COVID-19 era,digital economy also has a profound impact on China's“dual carbon”process.In this paper,the smart city pilot policy is taken as the proxy variable for the development of digital economy.Based on the panel data of 281 cities at the prefecture level and above in China from 2006 to 2019,the carbon emission reduction effect of smart city construction under the perspective of digital empowerment is empirically investigated by comprehensive use of the differential method,the two-stage three-step method and the spatial differential method.The conclusions show that compared with non-pilot cities,the carbon emissions of pilot smart cities are reduced by 2.8%on average,which means that the construction of smart cities significantly reduces the level of carbon emissions.This conclusion is still valid after a series of robustness tests,such as changing the estimation model and selecting the control group.Mechanism studies show that smart city construction has transformed urban development from the factor and investment-driven to the innovation-driven,and promoted urban low-carbon transformation through digital empowerment to exert energy upgrading effect,life transformation effect and resource allocation effect.The results from quantitative decomposition show that the above mechanism contributed more than 80%of the explanatory effect.Heterogeneity analysis shows that the carbon emission reduction effect of digital economy development is more obvious in large and above scale cities,more developed regions in eastern and southern China,and cities with high endowment of human,financial and physical resources.The spatial effect analysis shows that with the increase of distance threshold,the spillover effect generated by smart city construction is significantly reduced,and the conclusion is still valid after the use of differential spatial Durbin model.This paper not only provides new documentary evidence for the causal relationship between digital economy development and carbon emission governance,but also has important practical significance for exploring how to use digital economy to enable green and low-carbon transition in the post-pandemic period,so as to achieve high-quality economic development.
作者
秦炳涛
俞勇伟
葛力铭
郭援国
QIN Bing-tao;YU Yong-wei;GE Li-ming;GUO Yuan-guo(School of Management,University of Shanghai for Science and Technology,Shanghai 200093;School of Urban and Regional Science,Shanghai University of Finance and Economics,Shanghai 200433,China;Lee Kuan Yew School of Public Policy,National University of Singapore,Singapore 259772)
出处
《广东财经大学学报》
CSSCI
北大核心
2023年第3期4-23,共20页
Journal of Guangdong University of Finance & Economics
基金
教育部人文社会科学青年基金项目(16YJC790083)
上海财经大学研究生创新基金项目(CXJJ-2022-419)
上海理工大学人文社会科学培育项目(20SKPY05)
关键词
数字经济
碳排放
数字赋能
智慧降碳
智慧城市
碳减排效应
创新驱动
digital economy
carbon emission
digital empowerment
smart carbon reduction
smart city
carbon emission reduction effect
innovation drive
