Paul J. Feldstein, PhD, has been a professor and the Robert Gumbiner Chair in Health Care Management at the Paul Merage School of Business, University of California, Irvine, since 1987. Previously he was at the University of Michigan as a professor in both the Department of Economics and the School of Public Health. During his leaves from the university, Professor Feldstein worked at the Office of Management and Budget, the Social Security Administration, and the World Health Organization. Professor Feldstein has written eight books and more than 70 articles on healthcare.