Jaeger, David A.; Ruist, Joakim; Stuhler, Jan - 2018
on this "shift-share" instrument conflate the short- and long-run responses to immigration shocks. If the spatial … supply shocks. Estimates based on the conventional shift-share instrument are therefore unlikely to identify the short …-run effects. Our results are a cautionary tale for a large body of empirical work, not just on immigration, that rely on shift …