Dr. Miller's research program is designed to contribute to the design and delivery of effective community-based HIV prevention services, with a particular emphasis on a population at highest risk in the nation, young Black sexual minority males. She is interested in identifying structural and community-level HIV prevention programs that are effective in reducing HIV-related risk behavior among high risk young men and in delineating the contextual conditions in AIDS-related organizational environments that contribute to sustainable HIV prevention activity. Dr. Miller's research is grounded in the idea that the program and its environmental host combine to make a causal package; one cannot understand what makes a program effective and consider where and for whom else it might be effective without treating the programs context as part of the program. Useful evaluation must take into account how environment and program interact to produce observed effects or form a causal package. In researching what makes for an effective causal package of HIV prevention activity, Dr. Miller has a secondary aim of improving knowledge on evaluation theory and practice with regard to community-based programs.