Removing biased data to improve fairness and accuracy

• URL: http://arxiv.org/abs/2102.03054v1
• Date: Fri, 5 Feb 2021 08:34:45 GMT
• Title: Removing biased data to improve fairness and accuracy
• Authors: Sahil Verma, Michael Ernst, Rene Just
• Abstract summary: We propose a black-box approach to identify and remove biased training data. Machine learning models trained on such debiased data have low individual discrimination, often 0%. Our approach outperformed seven previous approaches in terms of individual discrimination and accuracy.
• Score: 1.3535770763481905
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Machine learning systems are often trained using data collected from historical decisions. If past decisions were biased, then automated systems that learn from historical data will also be biased. We propose a black-box approach to identify and remove biased training data. Machine learning models trained on such debiased data (a subset of the original training data) have low individual discrimination, often 0%. These models also have greater accuracy and lower statistical disparity than models trained on the full historical data. We evaluated our methodology in experiments using 6 real-world datasets. Our approach outperformed seven previous approaches in terms of individual discrimination and accuracy.

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