This collection reports on the progress of the intervention programs first described in" Innovative Approaches in the Treatment of Drug Abuse: Program Models and Strategies" (Inciardi and Fletcher, 1993). By examining the implementation of treatment initiatives, this study focuses on an area often neglected in the research literature: the context in which research is conducted. Applied researchers, particularly those who study users of illicit drugs, face many obstacles that investigators working in more controlled settings, or with more predictable and compliant subjects, often do not...