Papers › Locating disparities in machine learning
Locating disparities in machine learning
Moritz von Zahn, Oliver Hinz, Stefan Feuerriegel
Machine learning was repeatedly proven to provide predictions with disparate outcomes, in which subgroups of the population (e.g., defined by age, gender, or other sensitive attributes) are systematically disadvantaged. Previous literature has focused on detecting such disparities through statistical procedures for when the sensitive attribute is specified a priori. However, this limits applicability in real-world settings where datasets are high dimensional and, on top of that, sensitive attributes may be unknown. As a remedy, we propose a data-driven framework called Automatic Location of Disparities (ALD) which aims at locating disparities in machine learning. ALD meets several demands from machine learning practice: ALD (1) is applicable to arbitrary machine learning classifiers; (2) operates on different definitions of disparities (e.g., statistical parity or equalized odds); (3) deals with both categorical and continuous predictors; (4) is suitable to handle high-dimensional settings; and (5) even identifies disparities due to intersectionality where disparities arise from complex and multi-way interactions (e.g., age above 60 and female). ALD produces interpretable fairness reports as output. We demonstrate the effectiveness of ALD based on both synthetic and real-world datasets. As a result, ALD helps practitioners and researchers of algorithmic fairness to detect disparities in machine learning algorithms, so that disparate -- or even unfair -- outcomes can be mitigated. Moreover, ALD supports practitioners in conducting algorithmic audits and protecting individuals from discrimination.
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