Bootstrap re-sampling for unbalanced data in supervised learning

Bootstrap re-sampling for unbalanced data in supervised learning

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Article ID: iaor20021600
Country: Netherlands
Volume: 134
Issue: 1
Start Page Number: 141
End Page Number: 156
Publication Date: Oct 2001
Journal: European Journal of Operational Research
Authors: ,
Keywords: neural networks, simulation
Abstract:

This paper presents a technical framework to assess the impact of re-sampling on the ability of a supervised learning to correctly learn a classification problem. We use the bootstrap expression of the prediction error to identify the optimal re-sampling proportions in binary classification experiments using artificial neural networks. Based on Bayes decision rule and the a priori distribution of the objective data, an estimate for the optimal re-sampling proportion is derived as well as upper and lower bounds for the exact optimal proportion. The analytical considerations to extend the present method to cross-validation and multiple classes are also illustrated.

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