机构:
Harvard Kennedy Sch, Cambridge, MA USA
Harvard Med Sch, Dept Hlth Care Policy, 180 Longwood Ave,Room 202B, Boston, MA 02138 USA
Harvard TH Chan Sch Publ Hlth, Dept Hlth Policy & Management, Boston, MA USA
NBER, Cambridge, MA 02138 USAHarvard Kennedy Sch, Cambridge, MA USA