Frontiers Prevention Program (FPP) aims to support the delivery of a comprehensive package of interventions on targeting populations, who are seen as key to HIV/AIDS epidemic dynamics: sex workers, men who have sex with men, and people living with HIV/AIDS. These interventions occur within specific geographic sites that are seen as potential high HIV-transmission areas. The outcome evaluation seeks to measure the effect of the interventions. The study aims to evaluate: whether the FPP empowerment for prevention approach increases the level of social capital (community trust, reliance, responsibility and civic participation) among key populations actively involved in the interventions and wider key populations exposed to the interventions;  and whether increased social capital lead to increasing empowerment for prevention, actual reduction in risk behaviors and changes in knowledge attitudes and behavior. The study also seeks to evaluate whether the FPP approach lead to an enabling environment in which stigma and discrimination are reduced;   the relationship between an enabling environment and social capital; to what extent are  NGOs / CBOs and the services they provide participatory, client - centered and community based, and how does this change over time as a result of capacity building and other inputs. The baseline study of the outcome evaluation was completed in December 2005 and findings published^[1] Results from the study was presented at the XV and XVI International AIDS Conference. The study was sponsored by the International HIV/AIDS Alliance and Horizons (Population Council).^[2] The Institute has been commissioned to conduct the end of project evaluation which is expected to be completed by August 2007^[3]