1 a critical review of marketing research on diffusion new products deepa chandrasekaran and gerard j tellis forthcoming ed naresh malhotra vol 3 introduction because affect every aspect the life individuals communities countries economies study innovations is vital importance researchers have studied this topic in various disciplines including economics medicine agriculture sociology anthropology geography technology management we present primarily literature but also use word product broadly to cover any good service idea or person distinguish term from broader innovation which refers both method practice institution social entity even though restrict our focuses implications may hold as well for other vast dating back at least early publication by fourt woodlock 1960