Network effects and diffusion in pharmaceutical markets : antiulcer drugs
Author(s)Berndt, Ernst R.; Pindyck, Robert S.; Azoulay, Pierre, 1970-
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Cover title. "March, 1999."--Cover.Includes bibliographical references (p. 21-23).
Sloan School of Management, Massachusetts Institute of Technology
Working paper (Sloan School of Management) ; WP 4059-98.