摘 要：Park city construction (PCC), as an innovative urban construction concept, has been given a high hope of improving air quality. Chengdu, as the first pilot city to build a park city in China, has made a series of achievements in PCC. This study aims to assess the impact of Chengdu's PCC on its air quality and the underlying mechanisms, using the Synthetic Control Method (SCM). The findings demonstrate a substantial enhancement in air quality in Chengdu due to the PCC. In the four-year period following the implementation of the PCC, it is estimated that the Air Quality Index (AQI) experienced reductions of 7.826, 6.579, 7.817, and 0.861 units, respectively. Nevertheless, the available evidence indicates that the role of Chengdu's PCC in PM2.5 reduction is not significant. Path analysis reveals that the enhanced air quality in Chengdu can be attributed to the expansion of green spaces, acceleration of industrial green transformation, and increased energy efficiency facilitated by the PCC. These findings offer evidence to enhance the PCC in Chengdu, particularly with regard to the mitigation of PM2.5 levels. Additionally, this study presents empirical evidence supporting the advancement of PCC in a greater number of urban areas.
关键词:Park city construction；Urban air quality improvement；Air quality index (AQI) reduction；Synthetic control method (SCM)
【本文通讯作者为四川大学公共管理学院教授，博士生导师。主要研究方向为：公共政策、社会保障、健康经济学、数字治理。】
