创新型城市建设的减霾效应评估——来自试点城市的证据

Evaluation of Haze Reduction Effect of Innovative City Construction:Evidence from Pilot Cities

基于2007—2018年中国271个地级市的面板数据,运用DID和PSM-DID模型评估了创新型城市建设对雾霾污染的治理效应。研究发现,创新型城市建设可以降低城市雾霾污染,该结论在经过PSM-DID等方法的稳健性检验后仍成立。异质性分析表明,中部地区创新型城市建设降低雾霾污染的效果最显著,西部地区创新型城市建设对雾霾污染的抑制作用不明显。创新能力低的城市政策推行对雾霾污染的抑制作用显著且高于创新能力高的城市。FDI与环境规制强度高的城市建设能显著降低地级市雾霾污染。作用机制研究表明,创新型城市建设可通过调整产业结构、推动政府政策实施、提升技术创新效率和促使人力资本集聚等途径,对抑制城市雾霾污染产生间接的推动作用,且技术创新效应及人才集聚效应是创新型城市建设抑制雾霾污染的主要原因。

Based on the panel data of 271 prefecture-level cities in China from 2007—2018,the DID and PSM-DID methods are applied to assess effect of innovative city construction on haze pollution management.It has found that the gradual construction of innovative pilot cities can reduce urban haze pollution,and this conclusion still holds after the robustness verification of PSM-DID and other methods.The heterogeneity analysis shows that the innovative city construction in the central region has the most significant effect on reducing haze pollution,and the innovative city construction in the western region has no significant inhibitory effect on haze pollution.The effect of policy implementation on haze pollution is significantly higher in cities with low innovation capacity than in cities with high innovation capacity,and the pilot city construction in cities with high FDI and environmental regulation intensity significantly reduces haze pollution in prefecture-level cities.The mechanism of action study shows that innovative city construction can indirectly contribute to the suppression of urban haze pollution by adjusting industrial structure,promoting government policy implementation,enhancing the efficiency of technological innovation and promoting the concentration of human capital,and the effect of technological innovation and the concentration of talent are the main reasons for the suppression of haze pollution by innovative city construction.