碳强度约束政策对中国城市空气质量的影响

文章利用中国30个重点城市2003-2016年的面板数据,采用准倍差法考察碳强度约束政策对中国城市空气质量的影响,并从制度差异角度探讨碳强度约束政策对城市空气质量影响的异质性,稳健性检验证实结论的可靠性。结果显示:碳强度约束政策能够显著降低空气污染浓度,改善城市空气质量,随着时间推移,碳强度约束政策的效果呈先上升后下降的趋势,意味着其短期效果明显,中长期效果可能面临不确定性;碳强度约束政策对城市空气质量的影响受制于地区制度环境,政府质量越高、市场化程度越高以及国有经济占比越低碳强度约束政策对城市空气质量的改善效果越明显。

Impact of Carbon Intensity Constraint Policy on Urban Air Quality in China

This paper uses the panel data of China’s 30 key cities from 2003 to 2016 and employs the difference-in difference(DID)method to examine the impact of carbon intensity restraint policies on urban air quality.Furthermore,this paper explores the heterogeneity of carbon intensity constraint policy on urban air quality from the perspective of institutional differences.Robustness test confirms the reliability of the conclusion.The results show that:The carbon intensity constraint policy can significantly reduce the air pollution concentration and improve the urban air quality.As time goes by,the effect of the carbon intensity restraint policy rises first and then decreases,which means that its shortterm effect is obvious,and the medium-and long-term effects may face uncertainty.The impact of carbon intensity constraint policy on urban air quality is subject to the regional institutional environment.The higher government quality and marketization degree,the lower proportion of state-owned economy are conducive to improving the effect of carbon intensity restraint on urban air quality.