“…Regional economic, social, and cultural factors affect the relative propulsion and attractiveness of origins and destinations, as well as the highly selective and asymmetric migration processes (Lee 1966;Williamson 1988;Rogers 1990;Stillwell 2008;Shen 2016Shen , 2017. Thus, measuring the impact of regional origin-and destination-specific characteristics on migration flows can not only help to identify important determinants and dynamic mechanisms of migration, but also to understand the vulnerability and resilience of this complex network (Griffith and Chun 2015;Crown, Jaquet, and Faggian 2018). More importantly, migration is a path-dependent process: Inter-personal relations, through network and herd effects, facilitate current and subsequent migration.…”