1. Abby Alpert is an assistant professor of health care management at the Wharton School, University of Pennsylvania, in Philadelphia.
2. Helen Hsi was an analyst at the Health Policy Research Institute at the University of California, Irvine, when the analysis was conducted.
3. Mireille Jacobson ( ) is an associate professor of economics and public policy at the Paul Merage School of Business, University of California, Irvine.