Mark Edberg , Ph.D, M.A., is Associate Professor at the George Washington University School of Public Health and Health Services, with secondary appointments in the Department of Anthropology and the Elliott School of International Affairs. His work on this volume was conducted under his concurrent role as Director of Qualitative Research for Development Services Group, Inc. (DSG). He has directed or co-directed numerous research and intervention efforts focusing on at-risk youth, in both domestic and global contexts.