ducted research on the impact of health system change on the public health infrastructure, access to care for vulnerable populations, managed care, and the health care workforce. She is a former Assistant Director for Health Financing and Policy with the U.S. General Accounting Office, where she directed evaluations and policy analysis in the area of national and public health issues. From 1982 through 1988, she was Chief of Health Studies at the Regional Institute for Health and Social Welfare, the research arm of the Regional Ministry of Health in Madrid, Spain. Dr. Martinez received her B.A. from the University of Southern California and her Doctor of Science from the Johns Hopkins School of Hygiene and Public Health.