[1] US Dept HHS, Off Assistant Secretary Planning & Evaluat, Washington, DC 20201 USA
[2] Harvard Univ, Sch Publ Hlth, Sch Med, Boston, MA 02115 USA
[3] Harvard Univ, Brigham & Womens Hosp, Boston, MA 02115 USA
[4] Univ Michigan, Stephen M Ross Sch Business, Ann Arbor, MI 48109 USA
[5] Univ Michigan, Dept Hlth Management & Policy, Ann Arbor, MI 48109 USA
[6] Natl Bur Econ Res, Cambridge, MA 02138 USA
[7] Ctr Dis Control & Prevent, Natl Ctr Hlth Stat, Hyattsville, MD 20782 USA
[8] NYU, Sch Publ Serv, New York, NY 10003 USA
[9] Johns Hopkins Univ, Dept Econ, Baltimore, MD 21218 USA
[10] Univ Calif San Diego, La Jolla, CA 92093 USA