Chassin MR, Brook RH, Park RE, et al: Variations in the use of medical and surgical services by the Medicare population . N Engl J Med314:285-290, 1986
2.
Feder J., Hadley J., Zuckerman S.: How did Medicare's prospective payment system affect hospitals?New Engl J Med317:867-873, 1987
3.
Hiatt H.: America's Health in the Balance: Choice or Chance?New York, Harper and Row, 1987
4.
Keeler EB, Sloss EM, Brook RH, et al: Effects of cost sharing on physiological health, health practices, and money . Health Serv Res22:279-306, 1987
5.
Patricelli RE : Employers as managers of risk, cost, and quality . Health Affairs6:75-81, 1987
6.
Wennberg J., Gittelsohn A.: Variations in medical care among small areas. Sci Am246:120-135, 1982
