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Erel Segal-Halevi

8 accepted papers

2025

Reducing Leximin Fairness to Utilitarian Optimization

AAAI 2025technical

Two prominent objectives in social choice are utilitarian - maximizing the sum of agents' utilities, and leximin - maximizing the smallest agent's utility, then the second-smallest, etc. Utilitarianism is typically computationally easier to attain but is generally viewed as less fair. This paper pr…

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2023

Ordinal Maximin Share Approximation for Goods (Extended Abstract)

IJCAI 2023poster

In fair division of indivisible goods, l-out-of-d maximin share (MMS) is the value that an agent can guarantee by partitioning the goods into d bundles and choosing the l least preferred bundles. Most existing works aim to guarantee to all agents a constant fraction of their 1-out-of-n MMS. But this…

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2022

Weighted Fairness Notions for Indivisible Items Revisited

AAAI 2022technical

We revisit the setting of fairly allocating indivisible items when agents have different weights representing their entitlements. First, we propose a parameterized family of relaxations for weighted envy-freeness and the same for weighted proportionality; the parameters indicate whether smaller-weig…