During the Greek debt crisis after 2010, the German government insisted on harsh austerity measures. This led to a rapid cooling of relations between the Greek and German governments. We compile a new index of public acrimony between Germany and Greece based on newspaper reports and internet...

During the Greek debt crisis after 2010, the German government insisted on harsh austerity measures. This led to a rapid cooling of relations between the Greek and German governments. We compile a new index of public acrimony between Germany and Greece based on newspaper reports and internet...

During World War I the birth rate in France fell by 50%. Why? I build a model of fertility choices where the war implies a positive probability that a wife remains alone, a partially-compensated loss of a husband's income, and a temporary decline in productivity followed by faster growth. I...

Recent research on violence against civilians during wars has emphasized war-related factors over political ones. For example, factors such as control of territory or characteristics of the armed groups have been prioritized at the expense of factors such as ideological alignments or local...

How do nationalistic media affect animosity between ethnic groups? We consider one of Europe's deadliest conflicts since WWII, the Serbo-Croatian conflict. We show that, after a decade of peace, cross-border nationalistic Serbian radio triggers ethnic hatred toward Serbs in Croatia. Mostly...

The conflict in Northern Ireland was an example of "complex warfare" with both insurgency and sectarian violence. We present a unified model that helps to identify these two forms of conflict from the spatial distribution of violence. The model predicts that tectonic boundaries between...

During the Greek debt crisis after 2010, the German government insisted on harsh austerity measures. This led to a rapid cooling of relations between the Greek and German governments. We compile a new index of public acrimony between Germany and Greece based on newspaper reports and internet...

Network formation is often said to be driven by social capital considerations. A typical pattern observed in the empirical data on strategic alliances is that of small world networks: dense subgroups of firms interconnected by (few) clique-spanning ties. The typical argument is that there is...