[1] Cornell Univ, Dept Econ, Ithaca, NY 14853 USA
[2] Natl Bur Econ Res, Cambridge, MA 02138 USA
[3] NYU, Ctr Expt Social Sci, New York, NY 10012 USA
[4] NYU, Dept Econ, New York, NY 10012 USA
[5] Union Coll, Dept Psychol, Schenectady, NY 12308 USA
[6] Harvard Univ, Dept Econ, Cambridge, MA 02138 USA
[7] Iceland Heart Assoc, IS-201 Kopavogur, Iceland
[8] NIA, Lab Epidemiol Demog & Biometry, Bethesda, MD 20892 USA
[9] Massachusetts Gen Hosp, Ctr Human Genet Res, Boston, MA 02114 USA
[10] Stockholm Sch Econ, Dept Econ, SE-11383 Stockholm, Sweden
[11] Karolinska Inst, Dept Med Epidemiol & Biostat, SE-17177 Stockholm, Sweden
[12] McKinsey Consulting, Montreal, PQ H3B 4W8, Canada
[13] Harvard Univ, Dept Sociol, Cambridge, MA 02138 USA
[14] Harvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115 USA
[15] Univ Wisconsin, Dept Med, Madison, WI 53705 USA
[16] Northwestern Univ, Dept Sociol, Evanston, IL 60208 USA
[17] Univ Wisconsin, Dept Sociol, Madison, WI 53706 USA