This paper estimates risk reductions for each layer of security designed to prevent commercial passenger airliners from being commandeered by terrorists, kept under control for some time, and then crashed into specific targets. Probabilistic methods are used to characterize the uncertainty of rates of deterrence, detection, and disruption, as well…

Punctuated equilibrium theory (PET) is an agenda-based theory that offers a theoretical foundation for large budget shifts. PET emphasizes that the static, incremental nature of agendas is occasionally interrupted by punctuations. These punctuations indicate shifts in priority among the agenda items, and with those agenda shifts come trade-offs.…

This paper jointly examines the importance of parental influences, prices, and tobacco control policies on the smoking behavior of youths. Data are drawn from the Audits & Surveys (A&S) 1996 survey of high school students across the United States from "The Study of Smoking and Tobacco Use Among Young People" to examine the impact…