The authors analyze the optimal network structure of two types of terrorist organizations. In the centralized network, the leadership selects the level of individual effort and the level of group connectivity so as to maximize the expected net welfare of the organization’s membership....

After the events of 9/11, U.S. counterterrorism became more proactive in that the Patriot Act allowed the authorities far more freedom to directly attack terrorist network structures. We argue that rational terrorists will attempt to thwart such policies and restructure themselves to be less...

Using time-series procedures, the authors investigate whether transnational terrorism changed following 9/11 and the subsequent U.S.-led “war on terror.†Perhaps surprising, little has changed in the time series of overall incidents and most of its component series. When 9/11 is...

This study applies time-series techniques to investigate the current threat posed by transnational terrorist incidents. Although the number of incidents has dropped dramatically during the post-cold war period, transnational terrorism still presents a significant threat. In recent years, each...