1. Blue Cross of Indiana, Hospital Rate Review Committee, n.d., Report of activities for the year 1983 (Blue Cross of Indiana, Indianapolis, IN).
2. Competition and efficiency in the end stage renal disease program;Held;Journal of Health Economics,1983
3. Persistence in the choice of health insurance plans;Neipp,1985
4. Product differentiation advantages of pioneering brands;Schmalensee;American Economic Review,1982