This paper develops a model which predicts times to purchase from stated intention-to-buy measures. This model combines a mixture of Gompertz densities with a mixture of Bernoulli processes. It is tested on intention-to-buy measures for household durables collected by the National Statistics Institute.
BEMMAOR, A.C. and KRYCHA, K. (1995). Predicting Whether and When to Buy from Intents Data: Interaction versus Additive Models. In: Rotterdam School of Management, March 24, Erasmus University Rotterdam.