REFERENCES
- Dean J. Pricing policies for new products. Harvard Business Rev 1950;28(Nov-Dec):45–53.
- Levitt T. Exploit the product life cycle. Harvard Business Rev 1965;43(Nov-Dec):81–94.
- Dhalla NK, Yuspeh S. Forget the product life cycle! Harvard Business Rev 1976;54(Jan-Feb):102–12.
- Jain SC. Marketing planning and strategy. 2nd ed. Cincinnati, OH: South-Western Publishing Co., 1985.
- Smith MC. Principles of pharmaceutical marketing. 3rd ed. Philadelphia, PA: Lea & Febiger, 1983.
- ICrentz SE, Pilskaln SM. Product life cycle: still a valid framework for business planning. Top Health Care Fin 1988;15(Fa11):40–8.
- Ansell JAW. Dispelling the myth of the product life cycle. Pharm Exec 1988;8(Mar):38–42.
- Sethna KM. A study of the five year survival rate of new pharmaceutical specialties introduced in 1957 [Thesis]. Columbus, OH: Ohio State University, 1963.
- Pradhan SB. Research trends in the American pharmaceutical industry and the survival rate of new products, 1954–1963 [Dissertation]. Pittsburgh, PA: Uni-versity of Pittsburgh, 1965.
- Cox WE. Product life cycles and promotional strategy in the ethical drug industry [Dissertation]. Ann Arbor, MI: University of Michigan, 1963.
- Cox WE. Product life cycle as marketing models. J Business 1967;40(Oct):375–84.
- Norwood J. An analysis of new product market failures in the pharmaceu-tical industry including an econometric evaluation of the influences of promo-tional and R&D expenditures on pharmaceutical sales [Dissertation]. University, MS: University of Mississippi, 1970.
- Mazzoni DJ. New product reception: tactical use of competitive product life cycles in multinational marketing. Med Market Media 1973;8(Mar):13–21.
- Anon. National prescription audit. NPA description, 1988. IMS America, Ltd.