关键词:

智慧城市, 空气质量, 双重差分法, 异质性检验

Abstract:

Based on the panel data of 19 prefecture level cities in China from 2008 to 2017，this paper studies the impact of smart city construction on local air quality by taking the pilot construction of smart city as a quasi-natural experiment with the help of Difference-in-Difference model. The results show that the construction of smart city pilot has a significant effect on both CO₂ emission reduction and SO₂ emission reduction. After placebo test and a series of other robustness tests the above conclusion is still robust. Further heterogeneity analysis shows that the air quality improvement effect of pilot cities in the eastern region with relatively developed economy is better than that in the central and western regions. The policy enlightenment of the article is to promote the development of smart city construction to a higher level on the existing basis，optimize the collaborative linkage of industries among regions in the process of smart city construction，and contribute to the goal of carbon neutralization and carbon peak.

Key words:

 smart city, air quality, Difference-in-Differences, heterogeneity test