The Diffusion of Innovations: A Methodological Reappraisal
AbstractStudies of diffusion have traditionally relied on specific distributions-primarily the logistic- to characterize and estimate those processes.We argue here that such approach gives rise to serious problems of comparability and interpretation, and may result in large biases inthe estimates of the parameters of interest. We propose instead the Gini's expected mean differenceas ameasure of diffusion speed, discuss its advantages over the traditional approach, and tackle with it the problems of truncated processes, inter-group comparisons, and related issues. We also elaborateon the use of the hazardrate, and suggest some possible extensions. The diffusion of CT scanners is presented as an illustration.
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Bibliographic InfoArticle provided by American Statistical Association in its journal Journal of Business and Economic Statistics.
Volume (Year): 7 (1989)
Issue (Month): 1 (January)
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Other versions of this item:
- Manuel Trajtenberg & Shlomo Yitzhaki, 1982. "The Diffusion of Innovations: A Methodological Reappraisal," NBER Working Papers 1008, National Bureau of Economic Research, Inc.
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Jensen, Richard, 1982. "Adoption and diffusion of an innovation of uncertain profitability," Journal of Economic Theory, Elsevier, vol. 27(1), pages 182-193, June.
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- Jonathan Beck, 2006.
"The Sales Effect of Word of Mouth: A Model for Creative Goods and Estimates for Novels,"
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SP II 2006-16, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG).
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"Estimating level effects in diffusion of a new technology: Barcode scanning at the checkout counter,"
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ESMT-07-002, ESMT European School of Management and Technology.
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- Sarkar, Jayati, 1998. " Technological Diffusion: Alternative Theories and Historical Evidence," Journal of Economic Surveys, Wiley Blackwell, vol. 12(2), pages 131-76, April.
- Nin Pratt, Alejandro & Hertel, Thomas W. & Foster, Kenneth A. & Rae, Allan N., 2001. "Productivity Growth And Catching-Up: Implications For China'S Trade In Livestock Products," 2001 Annual meeting, August 5-8, Chicago, IL 20590, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
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"Usage and Diffusion of Cellular Telephony, 1998-2004,"
06-21, NET Institute, revised Oct 2006.
- Grajek, Michal & Kretschmer, Tobias, 2009. "Usage and diffusion of cellular telephony, 1998-2004," International Journal of Industrial Organization, Elsevier, vol. 27(2), pages 238-249, March.
- Michal Grajek & Tobias Kretschmer, 2006. "Usage and Diffusion of Cellular Telephony, 1998-2004," CIG Working Papers SP II 2006-20, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG).
- Michal Grajek & Tobias Kretschmer, 2007. "Usage and diffusion of cellular telephony, 1998-2004," ESMT Research Working Papers ESMT-07-003, ESMT European School of Management and Technology.
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