REFERENCES
- Baldwin, FL 1., Riley, D. A. 41. Wojcik, A. F. (1979). Prcscription purchasers' patron-age motives. Pharm Management, 151. 185–89.
- Christianson. J. B. & McGuire, W. (1979). Competition in the delivery of medical carc. N Eng J Med, 306, 812–17.
- de Lissovoy, G., Rice, T., Ermann, D. & Gabel, J. (1986). Preferred provider organi-zations: Today's models and tomorrow's prospects. Inquiry, 23, 7–15.
- Fielding, J. A. (1984). Corporate Health Management. Reading, MA: Addison-Weslcy Publishing Company, inc., 101–104.
- Gagnon. J. P. (1977). Factors affecting pharmacy patronage motives: A literature re. view. I Am Pharr; Assoc, NS 17, 556–66.
- Intcrstudy (1985). National HMO Census, 1984. Excelsior, MN: Intcrstudy.
- Luft, H. S. (1978). How do health-maintenance organizations achieve their "savings." N Eng .1 Med, 298, 1336–43.
- Manning, W. G., Leibowitz, A., Goldberg, G. A., et al. (1984). A controlled trial of the effect of a prepaid group practice on the use of services. N Eng .1 Med 310, 1505). 10.
- Market Facts (1983). National Prescription Buyers Survey. Chicago, FL: Market Facts, Inc.
- Melia, E. P., Avcoin, L. J., Duhl, L. J. St Kurokawa, P. S. (1983). Competition in the health care marketplace. N Eng J Med, 308, 788–92.