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arXiv · 2410.14640

HR-Bandit: Human-AI Collaborated Linear Recourse Bandit

Junyu Cao·Ruijiang Gao·Esmaeil Keyvanshokooh
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Abstract

Human doctors frequently recommend actionable recourses that allow patients to modify their conditions to access more effective treatments. Inspired by such healthcare scenarios, we propose the Recourse Linear UCB ($\textsf{RLinUCB}$) algorithm, which optimizes both action selection and feature modifications by balancing exploration and exploitation. We further extend this to the Human-AI Linear Recourse Bandit ($\textsf{HR-Bandit}$), which integrates human expertise to enhance performance. $\textsf{HR-Bandit}$ offers three key guarantees: (i) a warm-start guarantee for improved initial performance, (ii) a human-effort guarantee to minimize required human interactions, and (iii) a robustness guarantee that ensures sublinear regret even when human decisions are suboptimal. Empirical results, including a healthcare case study, validate its superior performance against existing benchmarks.

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Junyu Cao, Ruijiang Gao, Esmaeil Keyvanshokooh. 2024-10-18. HR-Bandit: Human-AI Collaborated Linear Recourse Bandit. https://arxiv.org/abs/2410.14640

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