Do high-speed railways accelerate urban land expansion in China? A study based on the multi-stage difference-in-differences model

High-speed railway (HSR) have become the main transportation mode in China and a crucial contributing factor for the formation and development of urban and regional spatial structure. This study aims to investigate the effects and mechanisms of HSR on urban land expansion in China. The multi-stage difference-in-differences (DID) estimation method is used to explore the cases of 35 mega cities. The main results are presented as follows. 1)...