methods, evaluation, and leadership. He has studied access to medical care for his entire professional career. Dr. Andersen developed the Behavioral Model of Health Services Use, which has been used extensively nationally and internationally as a framework for utilization and cost studies of general populations, as well as special studies of minorities, low-income populations, children, women, the elderly, oral health, the homeless, and the HIV-positive population. He has directed three national surveys of access to care and has led numerous evaluations of local and regional populations and programs designed to promote access to medical care. Dr. Andersen’s other research interests include international comparisons of health services systems, graduate medical education curriculum, physician health services organization integration, and evaluations of geriatric and primary care delivery. He was on the founding Board of the Association for Health Services Research and has been chair of the Medical Sociology Section of the American Sociological Association. In 1994 he received the association’s Leo G. Reeder award for Distinguished Service to Medical Sociology; in 1996 he received the Distinguished Investigator Award from the Association for Health Services Research; and in 1999 he received the Baxter Allegiance Health Services Research Prize. Dr. Andersen received his Ph.D. in sociology from Purdue University.

Dyan A. Aretakis, F.N.P., M.S.N., P.N.P., is project director of the Teen Health Center of the University of Virginia Health System, which she cofounded in 1991 to offer reproductive health care to local, mainly medically uninsured adolescents. She is also a practicing family nurse practitioner at the center, which serves more than 3,600 patients each year. In her role as director, Ms. Aretakis has developed patient and peer education programs and conducted state-wide professional conferences. She has served on numerous committees and advisory boards related to child and adolescent health. She is also a frequent speaker on the topic of adolescent reproductive health for professional groups, the Medical School and the School of Nursing at the University of Virginia, and statewide conferences and associations. Ms. Aretakis holds family nurse practitioner, master of science in nursing with a specialty in pediatrics, and pediatric nurse practitioner degrees from the University of Virginia.

Jennifer S. Barber, Ph.D., is an associate professor at the Institute for Social Research and an associate professor of sociology at the University of Michigan. She studies childbearing behavior, intergenerational processes, and attitude–behavior relationships in both the United States and Nepal. In the United States, Dr. Barber is currently conducting a mixed-method data collection project, combining survey interviews with semistructured interviews and a weekly electronic journal. Her current research in Nepal

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