push-pull effect
concept of immigaration, emmigration; factors that drive people away from a place and draw people to a new location
en-US/ˈpʊʃ - ˈpʊl ˈifɛkt/
en-GB/ˈpʊʃ - ˈpʊl ɪˈfɛkt/
concept of immigaration, emmigration; factors that drive people away from a place and draw people to a new location