Papers › Representative Action Selection for Large Action-Space Meta-Bandits

Representative Action Selection for Large Action-Space Meta-Bandits

23 May 2025arXiv:2505.18269archive 2025-07-28

Quan Zhou, Mark Kozdoba, Shie Mannor

We study the problem of selecting a subset from a large action space shared by a family of bandits, with the goal of achieving performance nearly matching that of using the full action space. We assume that similar actions tend to have related payoffs, modeled by a Gaussian process. To exploit this structure, we propose a simple epsilon-net algorithm to select a representative subset. We provide theoretical guarantees for its performance and compare it empirically to Thompson Sampling and Upper Confidence Bound.

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