数字经济与城市绿色全要素生产率:影响机制与经验证据

Digital Economy and Urban Green Total Factor Productivity:Influencing Mechanism and Empirical Evidence

文章利用2011-2018年城市面板数据测算了中国282个地级及以上城市的数字经济发展指数与绿色全要素生产率指数,实证分析了数字经济发展水平对城市绿色全要素生产率的影响效应及作用机制。结果表明,数字经济发展显著促进了中国城市绿色全要素生产率提升,这一结论在选取历史数据作为工具变量进行相关检验后依然成立。进一步的机制分析结果表明,城市绿色创新能力和城市生产效率是数字经济促进城市绿色全要素生产率提升的两个重要渠道;但城市的地理区位、行政级别、科教资源禀赋以及环境规制强度等异质性因素,使得数字经济发展对城市绿色全要素生产率的提升效果差异明显。

This paper calculates the digital economy development index and green total factor productivity(TFP)index of 282 cities at and above the prefectural level in China based on the panel data from 2011 to 2018,and empirically analyzes the impact and the influencing mechanism of developmental level of digital economy on urban green TFP.The results show that the development of digital economy has significantly promoted the improvement of green TFP in Chinese cities.This conclusion still holds after selecting historical data as instrumental variables for relevant tests.Further mechanism analysis results show that urban green innovation capability and urban production efficiency are two important channels for digital economy to promote urban green TFP.However,heterogeneous factors such as geographical location,administrative level,endowment of science and education resources,and intensity of environmental regulation lead to significant differences in the improvement effects of digital economy development on urban green TFP.