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Published in:
2008 | OriginalPaper | Chapter
Ensembles of Classifiers in Arrears Management
Authors : Chris Matthews, Esther Scheurmann
Published in: Soft Computing Applications in Business
Publisher: Springer Berlin Heidelberg
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The literature suggests that an ensemble of classifiers outperforms a single classifier across a range of classification problems. This chapter provides a brief background on issues related ensemble construction and data set imbalance. It describes the application of ensembles of neural network classifiers and rule based classifiers to the prediction of potential defaults for a set of personal loan accounts drawn from a medium sized Australian financial institution. The imbalanced nature of the data sets necessitated the implementation of strategies to avoid under learning of the minority class and two such approaches (minority over-sampling and majority under-sampling) were adopted here. The ensembles outperformed the single classifiers, irrespective of the strategy that was used. The results suggest that an ensemble approach has the potential to provide a high rate of classification accuracy for problem domains of this type.