Why do some democracies break their security commitments whereas others do not? This study proposes a research strategy to answer the question by analyzing the timing of unilateral exits from a coalition military operation. Coalition participants typically do not exit until a military mission...

This article aims to demonstrate that differences in the two major datasets can significantly affect the results of predictions of mass political killing. Mass political killing (such as Hitler's killing of some six million Jews, or the Rwanda genocide of 1994) has been studied for decades with...