We present a theory on migration of dual-earner couples and test it in the context of international migration. Our model predicts that the probability that a couple emigrates increases in the home-country earnings of the primary earner. The effect of the home-country earnings of the secondary earner may go either way. We test our theory using populationwide Danish administrative data from 1982 to 2010. We analyze migration decisions separately for couples in which men earned more and couples in which women earned more.
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