PPT Slide
2 Past Researches of Diffusion Patterns of New Products
- Fourt and Woodlock (1960), q=0, Exponential Curve, Grocery Products
- Mansfield (1961), p=0, Logistic Curve, Industrial Products
- Bass(1969), combined the above two
- Lekvall and Wahlbin (1973)
- Gatignon and Robertson (1985), 29 propositions
- Bayus(1993), Consumer Electronics and Electric Appliances
- Sawhney And Eliashberg (1996), Movies
Patterns can be regarded as being continuous from S-shaped ones to J-shaped ones.