世界银行：航空运输脱碳：准实验的启示（英文版）

The US-China direct flights in mid-2023 were only 7 percent of those available in mid-2019. This quasi-experiment informs the debate on air transport de-carbonization. An estimated structural model shows that re-establishing the pre-pandemic direct connectivity could increase passengers by 387 percent and reduce prices by 63 percent. Moreover, due to the suppression of flights, carbon dioxide emissions decreased by 80 percent. A counterfactual exercise shows that maintaining pre-COVID connect