Cited by 66Ethics and Social Impacts of AIAdvanced Bandit Algorithms ResearchMachine Learning and Data Classification

Fair Bayesian Optimization

Open access
Perrone, Valerio, Donini, Michele, Zafar, Muhammad Bilal, Schmucker, Robin, Kenthapadi, Krishnaram, Archambeau, Cédric·2021·Proceedings of the 2021 AAAI/ACM Conference on AI, Ethics, and Society

Abstract

Given the increasing importance of machine learning (ML) in our lives, several algorithmic fairness techniques have been proposed to mitigate biases in the outcomes of the ML models. However, most of these techniques are specialized to cater to a single family of ML models and a specific definition of fairness, limiting their adaptibility in practice. We introduce a general constrained Bayesian optimization (BO) framework to optimize the performance of any ML model while enforcing one or multiple fairness constraints. BO is a model-agnostic optimization method that has been successfully applied to automatically tune the hyperparameters of ML models. We apply BO with fairness constraints to a range of popular models, including random forests, gradient boosting, and neural networks, showing that we can obtain accurate and fair solutions by acting solely on the hyperparameters. We also show empirically that our approach is competitive with specialized techniques that enforce model-specific fairness constraints, and outperforms preprocessing methods that learn fair representations of the input data. Moreover, our method can be used in synergy with such specialized fairness techniques to tune their hyperparameters. Finally, we study the relationship between fairness and the hyperparameters selected by BO. We observe a correlation between regularization and unbiased models, explaining why acting on the hyperparameters leads to ML models that generalize well and are fair.

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  • Prior studies have shown that prioritising fairness-unaware model optimisation-e.g. by focusing solely on the model's accuracy-can lead to inadvertently prioritising models with higher levels of bias.

    “Unfortunately, as prior studies have shown [34,120,121,156], prioritising such fairness-unaware model optimisation-e.g. by focusing solely on the model's accuracy-can lead to inadvertently prioritising models with higher levels of bias.”

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Research works printed but not linked: 2

  1. S. Jabbari, M. Joseph, M. Kearns, J. Morgenstern, and A. Roth. Fairness in rein- forcement learning. ICML, 2017.
  2. R. Zemel, Y. Wu, K. Swersky, T. Pitassi, and C. Dwork. Learning fair representa- tions. ICML, 2013.

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Authors
Perrone, V., Donini, M., Zafar, M. B., Schmucker, R., Kenthapadi, K., & Archambeau, C.
Affiliations
  • Amazon (United States) (US)
  • Carnegie Mellon University (US)
Venue
Proceedings of the 2021 AAAI/ACM Conference on AI, Ethics, and Society
Publisher
ACM
Published
2021-07-21
Pages
854-863
ISSN
3065-8365 (ISSN-L)
OpenAlex
W3034997124
Cited by
66
References
67
Citations by year
2026: 6 · 2025: 7 · 2024: 15 · 2023: 15 · 2022: 9 · 2021: 11 · 2020: 3
FWCI
11.32
Type
conference paper
Language
en
Open access
Locations
  • Proceedings of the AAAI/ACM Conference on AI Ethics and Society (publishedVersion, cc-by-nc-nd)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Social Sciences › Safety Research › Ethics and Social Impacts of AI
  • Social Sciences › Decision Sciences › Management Science and Operations Research › Advanced Bandit Algorithms Research
  • Physical Sciences › Computer Science › Artificial Intelligence › Machine Learning and Data Classification
Keywords
algorithmic fairness, Bayesian optimization, fairness constraints, hyperparameter optimization, random forest, gradient boosting, artificial neural networks, regularization, model generalization

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