低碳城市试点政策与城市绿色创新水平——来自中国城市的经验证据

Low-carbon City Pilot Policy and Urban Green Innovation Level:Empirical Evidence from Chinese Cities

基于2006—2021年中国279个城市的平衡面板数据,采用渐进双重差分法,实证检验了低碳城市试点政策对城市绿色创新水平的影响。研究发现,低碳城市试点政策显著提升了城市绿色创新水平。作用机制检验结果显示,低碳城市试点政策主要通过产业结构升级和金融支持实现其对城市绿色创新水平的促进作用。异质性检验表明,低碳城市试点政策对重点城市、非资源型城市、科技支出较高与人口密度较大的城市绿色创新水平的提升作用更为显著。

Based on the city balance panel data of 279 cities in China from 2006 to 2021,this paper uses the spatial asymptotic double difference method to test the impact of low-carbon city pilot policies on urban green innovation level.The result shows that the low-carbon city pilot policy significantly improves the green innovation level.The mechanism analysisfinds that the low-carbon city pilot policy mainly promoted cities to improve green innovation levels by upgrading industrial structure andfinancial support.The heterogeneity test reveals that the low-carbon city pilot policy had a more significant policy impact on the green innovation level of key cities,non-resource-based cities,cities with high technology spending and population density.