Robust Multi-Agent Bandits with Heavy-Tailed Rewards and Information Asymmetry
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Computer Science > Machine Learning
Title:Robust Multi-Agent Bandits with Heavy-Tailed Rewards and Information Asymmetry
Abstract:The multi-armed bandit problem is a central framework in sequential decision-making, extensively studied under sub-Gaussian reward assumptions. However, real-world applications often involve heavy-tailed reward distributions and decentralized, information-asymmetric interactions. We study multi-agent multi-armed bandits with heavy-tailed rewards under three information-asymmetry regimes: unobserved actions with common rewards, observed actions with independent rewards, and unobserved actions with independent rewards. We develop robust decentralized algorithms for each setting and derive regret guarantees that nearly match centralized heavy-tailed rates. Experiments on a Pareto-distributed reward environment validate our theoretical findings and illustrate the trade-offs between synchronization, coordination, and exploration across the three regimes.
| Subjects: | Machine Learning (cs.LG); Artificial Intelligence (cs.AI) |
| Cite as: | arXiv:2608.10529 [cs.LG] |
| (or arXiv:2608.10529v1 [cs.LG] for this version) | |
| https://doi.org/10.48550/arXiv.2608.10529
arXiv-issued DOI via DataCite (pending registration)
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