The Effects of Class Rebalancing Techniques on Ensemble Classifiers on Credit Card Fraud Detection: An Empirical Study
2023 (English)In: AIP Conference Proceedings, American Institute of Physics Inc. , 2023, Vol. 2916:1, no 1, article id 030011Conference paper, Published paper (Refereed)
Abstract [en]
Millions of dollars in financial fraud losses can be minimized, and in some cases, completely avoided by implementing the appropriate fraud prediction model. Combining a suitable rebalancing strategy with data mining techniques on a large dataset can enhance the prediction model for credit card fraud. The objective of this study is to investigate the impact of sampling techniques on ensemble classifiers for constructing credit card default prediction models. To decide which combination of rebalancing technique and ensemble classifier works best on skewed datasets for credit card fraud detection, in this paper, we investigate and assess the performance of no sampling, random under sampling, Tomek link removal, random oversampling, SMOTE, and a combination of SMOTE and Tomek link removal using ensemble classifiers including XGBoost, LightGBM, and Random Forest. For evaluating the best combination of rebalancing technique and ensemble classifier, we have used precision, recall, f1 score, mcc, PR-AUC curve and ROCAUC curve as evaluation metrics. Based on overall evaluation matrics Random Forest, XGBoost perform best when paired with Tomek link removal, and LightGBM performs best when paired with random oversampling. All evaluation metrics of our empirical study indicate that Tomek link removal with Random Forest works best among all the different combinations of rebalancing techniques and ensemble classifiers for predicting fraudulent credit card transactions.
Place, publisher, year, edition, pages
American Institute of Physics Inc. , 2023. Vol. 2916:1, no 1, article id 030011
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-65366DOI: 10.1063/5.0177524Scopus ID: 2-s2.0-85181567588ISBN: 9780735447332 (print)OAI: oai:DiVA.org:mdh-65366DiVA, id: diva2:1828651
Conference
1st International Conference on Applied Data Science and Smart Systems, ADSSS 2022, Rajpura, India, 4 November 2022 through 5 November 2022
2024-01-172024-01-172024-01-17Bibliographically approved