When selecting a subset of candidates (a so-called committee) based on the preferences of
voters, proportional representation is often a major desideratum. When going beyond …

We focus on a simple, one-dimensional collective decision problem (often referred to as the
facility location problem) and explore issues of strategyproofness and proportionality-based …

We study committee voting rules under ranked preferences, which map the voters'
preference relations to a subset of the alternatives of predefined size. In this setting, the …

In recent years, there has been a surge in effort to formalize notions of fairness in machine
learning. We focus on clustering--one of the fundamental tasks in unsupervised machine …

We study the problem of designing multiwinner voting rules that are candidate monotone
and proportional. We show that the set of committees satisfying the proportionality axiom of …

In real-world elections where voters cast preference ballots, voters often provide only a
partial ranking of the candidates. Despite this empirical reality, prior social choice literature …

The one-dimensional facility location problem readily generalizes to many real world
problems, including social choice, project funding, and the geographic placement of facilities …

In social choice theory, the domain of single-peaked preference relations has proven
invaluable for obtaining positive results as the phantom median rules of Moulin (1980) …