TY - BOOK AU - VAN UM Eric AU - PISOIU Daniela TI - Dealing with uncertainty: the illusion of knowledge in the study of counterterrorism effectiveness PY - 2015/// KW - COUNTERTERRORISM KW - SECURITY KW - POLICY N2 - Efforts to combat terrorism have become a priority in the security agenda of most countries around the world, while the respective policies, tools and instruments have amounted to significant costs. In this article, the literature on counterterrorism (CT) effectiveness is reviewed. It is found that the literature displays case and data selection biases, and the results produced are often times contradictory, mostly due to the use of different indicators. A conceptualisation of CT effectiveness is proposed which should help to resolve come of the issues outlined. The article concludes by outlining some future research directions that should imporve the methodological grasp in the field UR - http://dx.doi.org/10.1080/17539153.2014.981400 ER -