marketing research on diffusion of new products 39 chapter 2 a critical review deepa chandrasekaran and gerard j tellis abstract we critically examine alternate models the turning points curve each these topics focus drivers speci cations estima tion methods researched in literature discover important generalizations about shape parameters characteristics across early stages product life cycle point out directions for future because affect every aspect individuals communities countries economies study innovations is vital importance researchers have studied this topic various disciplines including economics medicine agriculture sociology anthropology geography technology management present primarily but also use word broadly to cover any good service idea or person distinguish term from broader innovation which refers
