Author

Jabari Hastings

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Preprint Aug 2026

Maximum-Cost Strategic Facility Location: The Limits of Randomization

We consider strategic facility location in Euclidean space $\mathbb R^d$, where a mechanism selects a single facility based on the reported locations of $n$ agents and seeks to minimize the maximum distance from any agent to the facility. The optimal approximation ratio of deterministic strategyproof mechanisms is $2$....

Jabari Hastings, Misha Ivkov · 2 citations

Preprint Sep 2026

Stable Voting Rules on the Edge of Optimal Metric Distortion

We prove the existence of a randomized voting rule with metric distortion at most $2.13713$, within $0.025$ of the lower bound of $2.11264$. Our rule comes from a generalization of stable $k$-lotteries developed in the context of committee selection. In contrast to prior work, our rule samples from a single distributio...

Zi-Yi Cai, Moses Charikar, Jabari Hastings et al. · 1 citation