Research On The Mechanism And Effect Of Pilot Policies Of Innovative Cities On The Level Of Urban Green Innovation

Green innovation refers to innovative activities based on environmentally friendly and sustainable development,and is one of the important factors for China to achieve carbon neutrality.Based on the panel data of 281 prefecture-level cities from 2006 to2019,the innovative city pilot policy is regarded as a quasi-natural experiment,and a double difference model is constructed to compare the green innovation level of pilot cities and non-pilot cities before and after the implementation of the policy,so as to evaluate the effect of the policy.The results show that:(1)the pilot policy has a significant positive effect on the level of green innovation in cities,and the dynamic effect shows that the policy effect is increasing year by year.(2)The mechanism shows that the pilot policy can improve the green innovation level of the city by optimizing the industrial structure,improving the degree of economic agglomeration,attracting the concentration of outstanding talents,and promoting the proportion of government scientific research expenditure.(3)The heterogeneity test shows that the pilot policy has a stronger role in promoting the level of green innovation in cities with higher financial level development than in cities with lower financial level development,a stronger role in promoting the level of green innovation in cities with lower scientific and educational level than in cities with higher scientific and educational level,and a stronger role in promoting the level of green innovation in non-resource-based cities than in resource-based cities,The promotion of green innovation level in eastern cities is stronger than that in central and western cities.(4)Through further research and adjustment of the intermediary model,it is found that on the path that the innovative city pilot policy can improve the green innovation level of the city by increasing the government’s scientific research expenditure,the innovative city pilot policy can enhance the green innovation level of the city with higher environmental regulation intensity than the city with lower environmental regulation intensity.