数字经济发展对城市绿色创新的影响研究——基于异质性视角

Research on the Impact of Digital Economy Development on Urban Green Innovation——Based on Heterogeneity Perspective

如何提高绿色创新水平是我国密切关注的问题,在实现绿色技术研发的过程中,数字经济发挥了作用。基于此,本文选取2011~2022年我国270个城市数据,探究了数字经济对绿色创新的影响及其异质性,进一步利用门限空间杜宾模型检验了绿色创新的非对称空间溢出。结果发现:(1)数字经济发展显著促进了本地和邻近城市的绿色创新。数字经济对本地绿色创新的促进作用在较低的环境规制强度、较高的知识产权保护程度以及我国中部地区更为明显。数字经济的正向溢出效应在较高的知识产权保护水平和我国东部地区得到更好体现。同时数字经济发展能够促进本地和邻近城市的绿色创新质量和数量提升;(2)城市绿色创新表现出显著的非对称空间溢出效应,数字经济发展处于高水平的城市获得更大的正向空间溢出。

How to improve the level of green innovation is an issue that China pays close attention to.In the process of green technology research and development,the digital economy should play a role.Thus,this paper takes 270 cities from 2011 to 2022 as sample data,examines the impact of digital economy on green innovation and its heterogeneity,and further uses the threshold spatial Durbin model to test the asymmetric spatial spillover of green innovation.The results show that:First,the development of digital economy has significantly promoted green innovation in local and neighboring cities.The digital economy plays a greater role in supporting local green innovation in regions with lower environmental regulation intensity,higher intellectual property protection levels and in central China.The positive spillover effect of the digital economy is better reflected in the cities with stronger protection against intellectual property and cities in eastern China.At the same time,the development of digital economy can promote the quality and quantity of green innovation in local and neighboring cities.Second,urban green innovation shows a significant asymmetric spatial spillover effect,and cities with the most developed digital economy obtain the largest positive spatial spillover.