112 citations · 871 across the 84 of their papers we have counts for
11 papers · 2 filters
Fair mixing: the case of dichotomous preferences
Haris Aziz, Anna Bogomolnaia, Herve Moulin
Agents vote to choose a fair mixture of public outcomes; each agent likes or dislikes each outcome. We discuss three outstanding voting rules. The Conditional Utilitarian rule, a v…
Proportionally Representative Participatory Budgeting: Axioms and Algorithms
Haris Aziz, Barton Lee, Nimrod Talmon
Participatory budgeting is one of the exciting developments in deliberative grassroots democracy. We concentrate on approval elections and propose proportional representation axiom…
Sub-committee Approval Voting and Generalised Justified Representation Axioms
Haris Aziz, Barton E. Lee
Social choice is replete with various settings including single-winner voting, multi-winner voting, probabilistic voting, multiple referenda, and public decision making. We study a…
The Expanding Approvals Rule: Improving Proportional Representation and Monotonicity
Haris Aziz, Barton Lee
Proportional representation (PR) is often discussed in voting settings as a major desideratum. For the past century or so, it is common both in practice and in the academic literat…
Random Matching under Priorities: Stability and No Envy Concepts
Haris Aziz, Bettina Klaus
We consider stability concepts for random matchings where agents have preferences over objects and objects have priorities for the agents. When matchings are deterministic, the sta…
Fractional Hedonic Games
Haris Aziz, Florian Brandl, Felix Brandt +3
The work we present in this paper initiated the formal study of fractional hedonic games, coalition formation games in which the utility of a player is the average value he ascribe…
Equilibria in Sequential Allocation
Haris Aziz, Paul Goldberg, Toby Walsh
Sequential allocation is a simple mechanism for sharing multiple indivisible items. We study strategic behavior in sequential allocation. In particular, we consider Nash dynamics,…
Fair Allocation based on Diminishing Differences
Erel Segal-Halevi, Haris Aziz, Avinatan Hassidim
Ranking alternatives is a natural way for humans to explain their preferences. It is being used in many settings, such as school choice, course allocations and residency matches. I…
Rank Maximal Equal Contribution: a Probabilistic Social Choice Function
Haris Aziz, Pang Luo, Christine Rizkallah
When aggregating preferences of agents via voting, two desirable goals are to incentivize agents to participate in the voting process and then identify outcomes that are Pareto eff…
A Polynomial-time Algorithm to Achieve Extended Justified Representation
Haris Aziz, Shenwei Huang
We consider a committee voting setting in which each voter approves of a subset of candidates and based on the approvals, a target number of candidates are to be selected. In parti…
The Condorcet Principle for Multiwinner Elections: From Shortlisting to Proportionality
Haris Aziz, Edith Elkind, Piotr Faliszewski +2
We study two notions of stability in multiwinner elections that are based on the Condorcet criterion. The first notion was introduced by Gehrlein: A committee is stable if each com…