Neural network ensemble strategies for financial decision applications

Authors:
David West;Scott Dellana;Jingxia Qian
Affiliations:
Department of Decision Sciences, College of Business Administration, East Carolina University, Greenville, NC;Department of Decision Sciences, College of Business Administration, East Carolina University, Greenville, NC;Department of Decision Sciences, College of Business Administration, East Carolina University, Greenville, NC
Venue:
Computers and Operations Research
Year:
2005

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Abstract

Considerable research effort has been expended to identify more accurate models for decision support systems in financial decision domains including credit scoring and bankruptcy prediction. The focus of this earlier work has been to identify the "single best" prediction model from a collection that includes simple parametric models, nonparametric models that directly estimate data densities, and nonlinear pattern recognition models such as neural networks. Recent theories suggest this work may be misguided in that ensembles of predictors provide more accurate generalization than the reliance on a single model. This paper investigates three recent ensemble strategies: crossvalidation, bagging, and boosting. We employ the multilayer perceptron neural network as a base classifier. The generalization ability of the neural network ensemble is found to be superior to the single best model for three real world financial decision applications.