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DOI: 10.14569/IJARAI.2016.050901
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A Rank Aggregation Algorithm for Ensemble of Multiple Feature Selection Techniques in Credit Risk Evaluation

Author 1: Shashi Dahiya
Author 2: S.S Handa
Author 3: N.P Singh

International Journal of Advanced Research in Artificial Intelligence(IJARAI), Volume 5 Issue 9, 2016.

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Abstract: In credit risk evaluation the accuracy of a classifier is very significant for classifying the high-risk loan applicants correctly. Feature selection is one way of improving the accuracy of a classifier. It provides the classifier with important and relevant features for model development. This study uses the ensemble of multiple feature ranking techniques for feature selection of credit data. It uses five individual rank based feature selection methods. It proposes a novel rank aggregation algorithm for combining the ranks of the individual feature selection methods of the ensemble. This algorithm uses the rank order along with the rank score of the features in the ranked list of each feature selection method for rank aggregation. The ensemble of multiple feature selection techniques uses the novel rank aggregation algorithm and selects the relevant features using the 80%, 60%, 40% and 20% thresholds from the top of the aggregated ranked list for building the C4.5, MLP, C4.5 based Bagging and MLP based Bagging models. It was observed that the performance of models using the ensemble of multiple feature selection techniques is better than the performance of 5 individual rank based feature selection methods. The average performance of all the models was observed as best for the ensemble of feature selection techniques at 60% threshold. Also, the bagging based models outperformed the individual models most significantly for the 60% threshold. This increase in performance is more significant from the fact that the number of features were reduced by 40% for building the highest performing models. This reduces the data dimensions and hence the overall data size phenomenally for model building. The use of the ensemble of feature selection techniques using the novel aggregation algorithm provided more accurate models which are simpler, faster and easy to interpret.

Keywords: Classification; Credit Risk; Feature Selection; Ensemble; Rank Aggregation; Bagging

Shashi Dahiya, S.S Handa and N.P Singh, “A Rank Aggregation Algorithm for Ensemble of Multiple Feature Selection Techniques in Credit Risk Evaluation” International Journal of Advanced Research in Artificial Intelligence(IJARAI), 5(9), 2016. http://dx.doi.org/10.14569/IJARAI.2016.050901

@article{Dahiya2016,
title = {A Rank Aggregation Algorithm for Ensemble of Multiple Feature Selection Techniques in Credit Risk Evaluation},
journal = {International Journal of Advanced Research in Artificial Intelligence},
doi = {10.14569/IJARAI.2016.050901},
url = {http://dx.doi.org/10.14569/IJARAI.2016.050901},
year = {2016},
publisher = {The Science and Information Organization},
volume = {5},
number = {9},
author = {Shashi Dahiya and S.S Handa and N.P Singh}
}



Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

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