Thomas G. McGuire, PhD, is a professor of health economics in the Department of Health Care Policy at Harvard Medical School. His research focuses on the design and impact of health care payment systems, the economics of health care disparities, and the economics of mental health policy. Dr. McGuire has contributed to the theory of physician, hospital, and health plan payment. His research on health care disparities includes developing approaches to defining and measuring disparities, and study of the theory and measurement of provider discrimination. For more than 30 years, Dr. McGuire has conducted academic and policy research on the economics of mental health.