Does a state's use of indiscriminate violence incite insurgent attacks? To date, most existing theories and empirical studies have concluded that such violence is highly counterproductive because it creates new grievances while forcing victims to seek security, if not safety, in rebel arms. This...

From mobilizing masses to monitoring rebels, information and communication technologies (ICT) are transforming political conflict. We reflect on the contributions made by the articles of this special issue to the emerging ICT–political conflict research agenda, highlighting strengths of...

type="main" xml:id="rssb12027-abs-0001" <title type="main">Summary</title> <p>The propensity score plays a central role in a variety of causal inference settings. In particular, matching and weighting methods based on the estimated propensity score have become increasingly common in the analysis of observational data....</p>

Many randomized experiments suffer from the "truncation-by-death" problem where potential outcomes are not defined for some subpopulations. For example, in medical trials, quality-of-life measures are only defined for surviving patients. In this article, I derive the sharp bounds on causal...