Dr. Audrey Pettifor, PhD is an Associate Professor in the Department of Epidemiology and Faculty Fellow of the Carolina Population Center. She is an epidemiologist whose research focuses on structural determinants of HIV/STI infection in sub-Saharan Africa particularly in among adolescents and young women. Dr Pettifor has expertise on sexual behavior, HIV prevention, HIV testing, and structural interventions among adolescents and young adults in sub-Saharan Africa and has published extensively in the area of HIV and sexual behavior among youth in sub-Saharan Africa. Dr. Pettifor is PI of a large NIH funded randomized controlled trial in South Africa (HPTN 068) which examined the impact of a cash transfer conditional on school attendance on HIV incidence among young women—this is the study on which this grant is to be based. She is co-chair the HPTN adolescent science committee and has published over 80 articles in peer reviewed journals, primarily on HIV in sub-Saharan Africa.