Emigrants’ missing votes

What are the causal effects of emigration on election outcomes in the country of origin? Large emigration of high-skilled emigrants can lead to changes in the distribution of political preferences, which affect voting outcomes. Using administrative migration and voting data, we show that emigration from Poland following its accession to the European Union in 2004 caused an increase in vote shares for right-wing parties, while decreasing the vote share for left-wing parties due to emigrants’ missing left-leaning votes. To account for endogenous migration patterns, we construct an innovative instrument that measures the distance to the closest open EU border. Our results highlight that emigration enhances stayers’ trust in right-wing governments and increases stayers’ voting for parties with pro-European positions. Exploiting a change in voting rules over time allows to disentangle different mechanisms. These results have important implications for the design of voting policies.