What drives the cohesion of secessionist movements? Previous research emphasized the role of internal and external factors but produced mixed results regarding their effects. This article advances scholarship on this question by examining the role of critical junctures as periods of heightened...

This article provides a new conceptualization of regime transformation that allows scholars to address democratization and autocratization as related but obverse processes. We introduce a dataset that captures 680 episodes of regime transformation (ERT) from 1900 to 2019 and offers novel...

What drives the cohesion of secessionist movements? Previous research emphasized the role of internal and external factors but produced mixed results regarding their effects. This article advances scholarship on this question by examining the role of critical junctures as periods of heightened...

Does increasing Internet access and use challenge authoritarian elections? I argue that Internet access provides both opposition supporters and government authorities with new means to shape electoral conduct. Opposition supporters can use the Internet to report on electoral malpractice and...

We investigate the relationship between transnational terrorism and the restrictiveness of immigration policies. We argue that transnational terrorism may create incentives for governments to implement more restrictive migration policies. First, more restrictive policies may make terrorism a...

Over the past two decades, the United Nations Security Council has responded more strongly to some humanitarian crises than to others. This variation in Security Council action raises the important question of what factors motivate United Nations intervention. This article offers a...

Sample selection models, variants of which are the Heckman and Heckit models, are increasingly used by political scientists to accommodate data in which censoring of the dependent variable raises concerns of sample selectivity bias. Beyond demonstrating several pitfalls in the calculation of...

When collecting data, some observations will always be hard to confidently classify in accordance with stated definitions of war, civil conflict, or political violence. This research note draws on the experiences of the Uppsala Conflict Data Program in the last decade in managing such unclear...

Quality data is at the heart of all empirical research. Data collection on contentious politics, including civil war, terrorism, and protest has proceeded at a rapid pace over the last several years. This special section develops a set of best practices and offers advice to those involved in...