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by Portia Isaacson Bass
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Portia Isaacson Bass
computer industry
multiproduct, intercategory, generational and contingent diffusion and substitution
IBM General Purpose Computers | USA Annual Systems in Use | Phister, Jr., Montgomery. 1979. Data Processing Technology and Economics, 2nd Edition.
Bass, Portia Isaacson. 2003. Generational diffusion model data: the IBM mainframe case. Working Paper.
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