Welcome

I’m Jeremy, a Postdoctoral Scholar hosted by Edith Elkind, at the Northwestern University Department of Computer Science. Prior to joining Northwestern, I completed a PhD in the Algorithmic Decision Theory group at University of New South Wales, where I was advised by Haris Aziz. The primary theme of my research is the study of proportional representation in collective decision-making settings. To this end, I contribute meaningful definitions of representative fairness and devise algorithms which guarantee these notions along with other desirable properties. Often my focus is on democratic systems, such as participatory budgeting and citizens’ assemblies. Another strain of my research applies these ideas to ubiquitous tasks in AI decision-making systems, such as centroid clustering. More broadly, I am interested in topics at the intersection of microeconomic theory and algorithmics.

Here is my CV (updated December 2025).

What’s new?

October 2025 I am starting a position as a Postdoctoral Scholar at Northwestern University, where I will be hosted by Edith Elkind.

September 2025 Our paper “Approximately Fair and Population Consistent Budget Division via Simple Payment Schemes” has been published in Games and Economic Behavior.

September 2025 Our paper “Neighborhood Stability in Assignments on Graphs” has been accepted at WINE 2025.

May 2025 Our paper “Approximately Fair and Population Consistent Budget Division via Simple Payment Schemes” has been accepted at EC 2025.

Working Papers

Fair Transit Stop Placement: A Clustering Perspective and Beyond
Haris Aziz, Ling Gai, Yuhang Guo, Jeremy Vollen
[ Arxiv ]

The Panel Complexity of Sortition: Is 12 Angry Men Enough?
Johannes Brustle, Simone Fioravanti, Tomasz Ponitka, Jeremy Vollen
[ Arxiv ]

Journal Publications

Approximately Fair and Population Consistent Budget Division via Simple Payment Schemes
Haris Aziz, Patrick Lederer, Xinhang Lu, Mashbat Suzuki, Jeremy Vollen
In Games and Economic Behavior , 154:208-225, 2025.
[ Paper ] (Supercedes the EC version below.)

Coordinating Monetary Contributions in Participatory Budgeting
Haris Aziz, Sujit Gujar, Manisha Padala, Mashbat Suzuki, Jeremy Vollen
In Autonomous Agents and Multi-Agent Systems , 39(34), 2025.
[ Paper ] (Supercedes the SAGT version below.)

Conference Publications

Neighborhood Stability in Assignments on Graphs
Haris Aziz, Grzegorz Lisowski, Mashbat Suzuki, Jeremy Vollen
[ Arxiv ] [ WINE '25 ]

Approximately Fair and Population Consistent Budget Division via Simple Payment Schemes
Haris Aziz, Patrick Lederer, Xinhang Lu, Mashbat Suzuki, Jeremy Vollen
[ Arxiv ][ EC '25 ]

Proportionally Representative Clustering
Haris Aziz, Sean Morata Chu, Barton Lee, Jeremy Vollen
[ Arxiv ] [ WINE '24 ]

Maximum Flow is Fair: A Network Flow Approach to Committee Voting
Mashbat Suzuki and Jeremy Vollen
[ Arxiv ] [ EC '24 ]

Fair Lotteries for Participatory Budgeting
Haris Aziz, Xinhang Lu, Mashbat Suzuki, Jeremy Vollen, Toby Walsh
[ Arxiv ] [ AAAI '24 ]

Best-of-Both-Worlds Fairness in Committee Voting
Haris Aziz, Xinhang Lu, Mashbat Suzuki, Jeremy Vollen, Toby Walsh
[ Arxiv ] [ WINE '23 ]

Coordinating Monetary Contributions in Participatory Budgeting
Haris Aziz, Sujit Gujar, Manisha Padala, Mashbat Suzuki, Jeremy Vollen
[ Arxiv ] [ SAGT '23 ]

Misc. Research

Family Life in Lockdown
Pietro Biroli, Steven Bosworth, Marina Della Giusta, Amalia Di Girolamo, Sylvia Jaworska, Jeremy Vollen. (Frontiers in Psychology 2021)
[paper] [data and code] [slides]

The economic potential for energy storage in Nevada
Judy Chang, Ryan Hledik, John Imon Pedtke, Roger Lueken, Johannes Pfeifenberger, Jeremy Vollen. (2018)

[report]