Abstract: We present theory on international migration of dual-earner couples, and test it using Danish register data. Our model predicts that the probability that a couple emigrates is increasing in the earnings of the primary earner. The effect of the earnings of the secondary earner may go either way. The empirical analysis confirms that migration probability is always increasing in male primary earner’s income, and in most specifications in female primary earner’s income. Higher education of either partner makes couples more, and having children makes couples less mobile. Power couples are most likely to emigrate, but also most likely to return.

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