Quota-based debiasing can decrease representation of the most under-represented groups

Many important decisions in societies such as school admissions, hiring or elections are based on the selection of top-ranking individuals from a larger pool of candidates. This process is often subject to biases, which typically manifest as an under-representation of certain groups among the select...

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Main Authors: I. Smirnov, F. Lemmerich, M. Strohmaier
Format: Article
Language:English
Published: The Royal Society 2021-09-01
Series:Royal Society Open Science
Subjects:
Online Access:https://royalsocietypublishing.org/doi/10.1098/rsos.210821
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author I. Smirnov
F. Lemmerich
M. Strohmaier
author_facet I. Smirnov
F. Lemmerich
M. Strohmaier
author_sort I. Smirnov
collection DOAJ
description Many important decisions in societies such as school admissions, hiring or elections are based on the selection of top-ranking individuals from a larger pool of candidates. This process is often subject to biases, which typically manifest as an under-representation of certain groups among the selected or accepted individuals. The most common approach to this issue is debiasing, for example, via the introduction of quotas that ensure a proportional representation of groups with respect to a certain, often binary attribute. This, however, has the potential to induce changes in representation with respect to other attributes. For the case of two correlated binary attributes, we show that quota-based debiasing based on a single attribute can worsen the representation of the most under-represented intersectional groups and decrease the overall fairness of selection. Our results demonstrate the importance of including all relevant attributes in debiasing procedures and that more efforts need to be put into eliminating the root causes of inequalities as purely numerical solutions such as quota-based debiasing might lead to unintended consequences.
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spelling doaj.art-448c35b5cfa947d99e6992c2c63689642022-12-21T21:26:56ZengThe Royal SocietyRoyal Society Open Science2054-57032021-09-018910.1098/rsos.210821Quota-based debiasing can decrease representation of the most under-represented groupsI. Smirnov0F. Lemmerich1M. Strohmaier2Department for Society, Technology and Human Factors and Department of Computer Science, RWTH Aachen University, Aachen, Nordrhein-Westfalen, GermanyFaculty of Computer Science and Mathematics, University of Passau, Passau, Bayern, GermanyDepartment for Society, Technology and Human Factors and Department of Computer Science, RWTH Aachen University, Aachen, Nordrhein-Westfalen, GermanyMany important decisions in societies such as school admissions, hiring or elections are based on the selection of top-ranking individuals from a larger pool of candidates. This process is often subject to biases, which typically manifest as an under-representation of certain groups among the selected or accepted individuals. The most common approach to this issue is debiasing, for example, via the introduction of quotas that ensure a proportional representation of groups with respect to a certain, often binary attribute. This, however, has the potential to induce changes in representation with respect to other attributes. For the case of two correlated binary attributes, we show that quota-based debiasing based on a single attribute can worsen the representation of the most under-represented intersectional groups and decrease the overall fairness of selection. Our results demonstrate the importance of including all relevant attributes in debiasing procedures and that more efforts need to be put into eliminating the root causes of inequalities as purely numerical solutions such as quota-based debiasing might lead to unintended consequences.https://royalsocietypublishing.org/doi/10.1098/rsos.210821quotadebiasingalgorithmic fairnessintersectionality
spellingShingle I. Smirnov
F. Lemmerich
M. Strohmaier
Quota-based debiasing can decrease representation of the most under-represented groups
Royal Society Open Science
quota
debiasing
algorithmic fairness
intersectionality
title Quota-based debiasing can decrease representation of the most under-represented groups
title_full Quota-based debiasing can decrease representation of the most under-represented groups
title_fullStr Quota-based debiasing can decrease representation of the most under-represented groups
title_full_unstemmed Quota-based debiasing can decrease representation of the most under-represented groups
title_short Quota-based debiasing can decrease representation of the most under-represented groups
title_sort quota based debiasing can decrease representation of the most under represented groups
topic quota
debiasing
algorithmic fairness
intersectionality
url https://royalsocietypublishing.org/doi/10.1098/rsos.210821
work_keys_str_mv AT ismirnov quotabaseddebiasingcandecreaserepresentationofthemostunderrepresentedgroups
AT flemmerich quotabaseddebiasingcandecreaserepresentationofthemostunderrepresentedgroups
AT mstrohmaier quotabaseddebiasingcandecreaserepresentationofthemostunderrepresentedgroups