1. Most of the authors are with the National Health Statistics Group (NHSG), Office of the Actuary, Centers for Medicare and Medicaid Services, in Baltimore, Maryland. Sean Keehan () is an economist in the NHSG. Andrea Sisko, Sheila Smith, and Cathy Cowan are also economists there. John Poisal is a deputy director of the NHSG. Christopher Truffer and M. Kent Clemens are actuaries in the Medicare and Medicaid Cost Estimates Group. Other members of the National Health Expenditure Accounts Projections Team are...