Tommy Krieger's main fields of research are political economy, development economics, economic history, and public economics. The primary objective of his research is to show how political decisions, events, and institutions affect economic outcomes. To address this question, he exploits historical and contemporary data and applies state-of-the art empirical methods. From time to time, he adds theoretical models to his papers. He has also written some methodological papers on data aggregation techniques and the computation of social science indices.
In his most recent working paper, he uses a natural experiment and conducts a conjoint experiment to examine how far-right mass protests affect internal migration. The results suggest that such rallies change the reputation of city and therefore have short- and medium-run effects on the number of incoming people. The paper also shows that reactions to far-right protests depends on individual political attitudes.