We investigate whether individuals who migrate within the UK become happier after the move than they were before it and whether the effect is permanent or transient . . . Our findings make an original contribution by revealing for the first time that, on average, migration is preceded by a period when individuals experience a significant decline in happiness. The boost that is received through migration appears to bring people back to their initial level of happiness . . . Perhaps surprisingly, long-distance migrants are at least as happy as short-distance migrants despite the higher social costs that are involved.
That is from the new paper "Does Migration Make You Happy? A Longitudinal Study of Internal Migration and Subjective Well-Being" by Beata Nowok et al.