Democracies go to war with each other less frequently than dictatorships do with each other. This isan established empirical regularity. However, it is not clear whether there is a causal link betweendemocracy and peace. We use laboratory experiments to study whether there is a causal impact. We...

Democracies go to war with each other less frequently than dictatorships do with each other. This is an established empirical regularity. However, it is not clear whether there is a causal link between democracy and peace. We use laboratory experiments to study whether there is a causal impact....