Virtually all of the empirical studies on market segmentation can be characterized as unsuccessful in terms of R². That is, the set of independent variables used have not explained much of the variance in purchasing behavior. R²'s of 0.01 and 0,02 are not uncommon. In this article we show that...</sup>

In the field of media research, the beta binomial has performed very well for estimating the distribution of the frequency of exposures to a media vehicle. However, long-term projections have shown consistent biases. The beta binomial geometric model, an extension of the well-known beta binomial...

This article is concerned with counting and identifying those customers who are still active. The issue is important in at least three settings: monitoring the size and growth rate of a firm's ongoing customer base, evaluating a new product's success based on the pattern of trial and repeat...

In this paper we will present some basic concepts of the Hendry System and derive the results claimed in the HendroDynamics Chapters [HendroDynamics: Fundamental Laws of Consumer Dynamics, Hendry Corporation, Chapter 1 (1970) and Chapter 2 (1971).] from two simple probabilistic assumptions;...

Many clinics that offer in vitro fertilization (IVF) have begun to market the following options to couples: (1) an a la carte program where the couple pays $7,500 per attempt regardless of the outcome; or (2) a money-back-guarantee program where the couple pays a $15,000 fee that covers up to...

In memoriam for Judith Larrivee (1947-1993), Technical Editor of Management Science.

There are many situations where one is interested in predicting the expected number of events in period 2 given that x events occurred in period 1. For example, insurance companies must decide whether or not to cancel the insurance of drivers who had 3 or more accidents during the previous year....