城市数字经济对绿色全要素生产率的空间效应研究——理论机理与实证检验

Spatial Effect of Urban Digital Economy on Green Total Factor Productivity: Theoretical Mechanism and Empirical Test

将数据作为新型生产要素纳入空间全要素生产率理论分析框架,基于2011~2020年我国254个地级及以上城市的面板数据,采用熵值法与SBM方向性距离函数的Malmquist-Luenberger指数法,分别考察城市数字经济与绿色全要素生产率发展情况,并构建空间计量模型实证分析数字经济对绿色全要素生产率的空间效应。研究发现:城市数字经济发展与绿色全要素生产率存在显著的空间相关性,数字经济的蓬勃发展不仅可对本地区绿色全要素生产率产生积极影响,同时其空间溢出效应也有助于其他地区绿色全要素生产率的提升;相较于经济相对发达的沿海城市群,数字经济发展对中原、长江中游等内陆城市群绿色全要素生产率的推动作用更为明显。鉴于此,应深入贯彻新发展理念,营造绿色发展环境,充分发挥数字经济的跨区溢出效应,进一步促进城市绿色全要素生产率的提升。

Taking data capital as a new production factor into the theoretical analysis framework of spatial total factor productivity, based on the panel data of 254 cities in China from 2011 to 2020, this paper constructs a spatial econometric model to empirically analyze the spatial effect of digital economy on green total factor productivity. The results show that there is a significant spatial correlation between urban digital economy and green total factor productivity. The vigorous development of digital economy not only has a positive impact on the green total factor productivity in this region, but also its spatial spillover effect can help to improve the green total factor productivity in other regions. Compared with the coastal urban agglomerations with relatively developed economy, the digital economy plays a more significant role in promoting the green total factor productivity of inland urban agglomerations, such as the Central Plains and the middle reaches of the Yangtze River. In view of this, thoroughly implementing the new development concept, creating an excellent green development environment, and giving full play to the cross-regional spillover effect of the digital economy will help to further promote the improvement of urban green total factor productivity.