Forecasting repeat sales at CDNOW: A case study

Forecasting repeat sales at CDNOW: A case study

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Article ID: iaor20021623
Country: United States
Volume: 31
Issue: 3
Publication Date: May 2001
Journal: Interfaces
Authors: ,
Keywords: marketing, behaviour, forecasting: applications, e-commerce
Abstract:

We conducted a modeling exercise in conjunction with the on-line music retailer CDNOW to develop a simple stochastic model of buyer behavior capable of forecasting medium-term aggregate CD purchasing by a cohort of new customers. We modeled weekly sales using a finite mixture of beta-geometric distributions with a separate time-varying component to capture nonstationarity in repeat buying. The resulting model can easily be implemented within a standard spreadsheet environment (for example, Microsoft Excel). It does a good job of describing the underlying sales patterns and produces an excellent medium-term forecast.

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