Forecasting the Diffusion of Innovation: A Stochastic Bass Model With Log-Normal and Mean-Reverting Error Process
- 1 June 2010
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Engineering Management
- Vol. 58 (2), 228-249
- https://doi.org/10.1109/tem.2010.2048912
Abstract
Forecasting the diffusion of innovations plays a major role in managing technology development and in engineering management overall. In this paper, we extend the conventional Bass model stochastically by specifying the error process of sales as log-normal and mean-reverting. Our model satisfies the following reasonable properties, which are generally ignored in the existing literature: sales cannot be negative, the error process can have a memory, and sales fluctuate more when they are high and less when they are low. The conventional and widely used model that assumes normally distributed error term does not have these properties. We address how to forecast properly under the log-normal and mean-reverting error process, and show analytically and numerically that in our extended model sales forecasts can substantially alter conventional Bass forecasts. We also analyze the model empirically, showing that our extension can improve the accuracy of future sales forecasts.Keywords
This publication has 22 references indexed in Scilit:
- Electricity consumption in Morocco: Stochastic Gompertz diffusion analysis with exogenous factorsApplied Energy, 2006
- Modelling and forecasting the diffusion of innovation – A 25-year reviewInternational Journal of Forecasting, 2006
- On the Econometrics of the Bass Diffusion ModelJournal of Business & Economic Statistics, 2005
- Forecasting the market diffusion of disruptive and discontinuous innovationIEEE Transactions on Engineering Management, 2002
- Information technology innovations: general diffusion patterns and its relationships to innovation characteristicsIEEE Transactions on Engineering Management, 2002
- Testing for residual autocorrelation in growth curve modelsTechnological Forecasting and Social Change, 2002
- Technological innovation diffusion: the proliferation of substitution models and easing the user's dilemmaIEEE Transactions on Engineering Management, 1992
- Bond and Option Pricing when Short Rates are LognormalCFA Magazine, 1991
- A Theory of the Term Structure of Interest RatesEconometrica, 1985
- Time Series Forecasting Based on the Logistic CurveJournal of the Operational Research Society, 1984