Data and do-files (in Stata) for James A. Piazza and Michael J. Soules "Terror After the Caliphate: The Effect of ISIS' Loss of Control over Population Centers on Patterns of Global Terrorism" Security Studies.

One prevailing view treats Al Qaeda as a monolithic entity with a global network of affiliates. Yet, certain affiliates appear more committed to local political and territorial goals – parochial, not global, terrorists. We construct a classification scheme to differentiate affiliates conceptually and empirically, and then track their types over time. We sort Al Qaeda’s network of affiliates using a principal components analysis of terrorist attacks from 1988 to 2012. We show that this aids in identifying latent affiliate types, and interpreting shifts in behavior. We find that despite Al Qaeda’s anti-western rhetoric, there exists a global-parochial divide in which most affiliates are parochial – with anti-Western groups pursuing local political goals even when Western targets remain. By providing an empirical strategy to identify which affiliates are more or less aligned with global terrorism, this research holds implications for the literatures on terrorism and civil war, terrorism and democracy, and the effects of counterterrorism.