During the Age of Mass Migration, 30 million Europeans emigrated to the United States. We study the long-term political effects of this large-scale migration episode on origin communities using detailed historical data from Sweden, a major sending country in the period. To instrument for...

We study the political effects of mass emigration to the United States in the 19th century using data from Sweden. To instrument for total emigration over several decades, we exploit severe local frost shocks that sparked an initial wave of emigration, interacted with within-country travel...

In this comment, I revisit a question raised in Karadja and Prawitz (2019) concerning a causal relationship between mass emigration and long-run political outcomes. I find that their results are not robust to (i) selection of the appropriate control variables, (ii) using valid cluster-robust...