TY  - JOUR
AU  - Greenstein,Shane M.
AU  - Wade,James B.
TI  - Dynamic Modeling of the Product Life Cycle in the Commercial Mainframe Computer Market, 1968-1982
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 6124
PY  - 1997
Y2  - August 1997
UR  - http://www.nber.org/papers/w6124
L1  - http://www.nber.org/papers/w6124.pdf
N1  - Author contact info:
Shane Greenstein
The Elinor and Wendell Hobbs Professor
Kellogg School of Management
Northwestern University
2001 Sheridan Road
Evanston, IL  60208-2013
Tel: 847/467-5672
Fax: 847/467-1777
E-Mail: greenstein@kellogg.northwestern.edu
AB  - This research investigates product life cycles in the commercial mainframe computer market.  We show that empirical studies conducted at the product level are useful for investigating processes underlying product life cycles.  We use hazard models with time-varying covariates to estimate the probability of product exit and Poisson models to estimate the probability of introduction.  We measure the importance of different aspects of market structure, such as the degree of competitiveness, cannibalization, vintage, product niche and firm effects.  We find some evidence of a relationship between the determinants of product exit and product entry.
ER  -