Joan E. DaVanzo, Ph.D., M.S.W., is chief executive officer of Dobson, DaVanzo. Before she cofounded the firm, she served as vice president at The Lewin Group for almost a decade. Her research interests include Medicare payment policy and the socio-medical aspects of normal aging. Dr. DaVanzo has expertise in both qualitative and quantitative analyses, and brings a clinical perspective to her consulting work. She also has extensive experience in the use and interpretation of large datasets, such as Medicare claims files, Medical Expenditure Panel Survey, Medicare Current Beneficiary Survey, and National Health and Nutrition Examination Survey.