Li, Dan; Fang, Rongrong; Liu, Yuhang; Tang, Cheng; Wu, … - 2026
-level economies. The YRD's success in addressing air pollution at the county level directly affects the ecological security of the … influence of regional integration on county-level air pollution using the difference-in-differences approach, the synthetic … significantly reduce air pollution at the county level; (2) the environmental impact of regional integration is heterogeneous …