1. Rice DP, Rosenberg HM, Curtin LR, et al. Changing mortality patterns, health services utilization and health care expenditures, U.S. 1978–2003. Vital and Health Statistics. Washington, DC: U.S. Government Printing Office, 1983; Series 3-No. 23. DHHS publication no. (PHS)83-1407.
2. Weil P. Comparative costs to the Medicare program of seven prepaid group practices and controls. Milbank Mem Fund Q. 1976;54:339–65.
3. Greenlick MR, Lamb SJ, Carpenter TM, et al. Kaiser-Permanente’s Medicare plus project: a successful Medicare prospective payment demonstration. Health Care Financing Rev. 1983;4:85–97.
4. Wolfson D, Bell C, Newberry D. Fallon’s senior plan: a summary of the three-year marketing experience. Group Health. 1984;5:4–7.
5. Bates EW, Brown BS. Geriatric care needs and HMO technology: a theoretical analysis and initial findings from the National Medicare Competition Evaluation. Med Care. 1988;26:488–98.