Predicting Customer Retention and Profitability by Using Random Forests and Regression Forests Techniques
In an era of strong customer relationship management (CRM) emphasis, firms strive to build valuable relationships with their existing customer base. In this study we attempt to better understand three important measures of customer outcome: next buy, partial defection and customers’ profitability evolution. By means of random forests techniques we investigate a broad set of explanatory variables, including past customer behavior, observed customer heterogeneity and some typical variables related to intermediaries. We analyze a real-life sample of 100,000 customers taken from the data warehouse of a large European financial services company. Two types of random forests techniques are employed to analyze the data: random forests are used for binary classification, whereas regression forests are applied for the models with linear dependent variables. Our research findings demonstrate that both random forests techniques provide better fit for the estimation and validation sample compared to ordinary linear regression and logistic regression models. Furthermore, we find evidence that the same set of variables have a different impact on buying versus defection versus profitability behavior. Our findings suggest that past customer behavior is more important to generate repeat purchasing and favorable profitability evolutions, while the intermediary’s role has a greater impact on the customers’ defection proneness. Finally, our results demonstrate the benefits of analyzing different customer outcome variables simultaneously, since an extended investigation of the next buy - partial defection - customer profitability triad indicates that one cannot fully understand a particular outcome without understanding the other related behavioral outcome variables.
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- Buckinx, Wouter & Van den Poel, Dirk, 2005.
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"Customer Attrition Analysis For Financial Services Using Proportional Hazard Models,"
Working Papers of Faculty of Economics and Business Administration, Ghent University, Belgium
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European Journal of Operational Research,
Elsevier, vol. 156(2), pages 508-523, July.
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