Does social media or offline social cohesion overcome collective action problems more effectively when both types of networks are prevalent? We investigate non-violent protests against a place-based economic reform in Austria—a country where one in two citizens uses Facebook but also one in...

Why do public policies change little over time in individual places, sometimes for centuries? We investigate different mechanisms for policy persistence. Several city mayors serving in democratic Weimar Germany were expelled by the Nazis in 1933, but re-installed by the Allies after World War...

Does social capital always promote solidarity and democracy, or are social networks such as sports clubs also vulnerable to populism? We exploit quasi-experimental variation in sports club membership in German cities. Sports clubs are booming in cities with successful soccer teams which pass the...

Can public infrastructure help regions to mitigate large shocks? We examine how hospital infrastructure contributes to regional resilience in the event of serious health emergencies. During the 1918 Spanish flu pandemic, four out of every 1,000 Germans died. We find lower influenza mortality...

Left-hand drive (LHD) vehicles share higher road accident risks under left-hand traffic because of blind spot areas. Due to low import prices, the number of wrong-hand drive vehicles skyrockets in emerging countries like Georgia, Kyrgyzstan and Russia. I identify the causal effect of wrong-hand...

States merge local governments to achieve economies of scale. Little is known to which extent mergers of county-sized local governments reduce expenditures, and influence political outcomes. I use the synthetic control method to identify the effect of mergers of large local governments in...

Voter turnout has declined in many industrialized countries, raising the question of whether electoral institutions increase voter turnout. We exploit an electoral reform in the Austrian state of Burgenland as a natural experiment to identify the causal effect of opening hours of polling...

We show that migrating extremists shape political landscapes toward their ideology in the long run. We exploit the unexpected division of the state of Upper Austria into a US and a Soviet occupation zone after WWII. Zoning prompts large-scale Nazi migration to US occupied regions. Regions that...

How do staying minorities that evade ethnic cleansing integrate into re-settled communities? After World War Two, three million ethnic Germans were expelled from Czechoslovakia’s Sudetenland, but some were allowed to stay, many of them left-leaning anti-fascists. We study quasi-experimental...

How do staying minorities that evade ethnic cleansing integrate into re-settled communities? After World War Two, three million ethnic Germans were expelled from Czechoslovakia's Sudetenland, but some were allowed to stay, many of them left-leaning anti-fascists. We study quasi-experimental...