Event history models have become a dominant method of analysis in the study of international relations. Conventional event history models, however, retain the assumption that the effects of the covariates remain proportional to each other throughout the duration of the subject's phase....

The assassination of a political leader is among the highest-profile acts of political violence, and conventional wisdom holds that such events often have substantial political, social, and economic effects on states. We investigate the extent to which the assassination of a head of state...