Research

W3
Proportionality in Ranking Compression PDF
Daniel Halpern, Xinyu Liu, Evi Micha, Yu Peng Ng, and Warut Suksompong
W2
Linear Social Choice with Few Queries: A Moment-Based Approach PDF
Luise Ge, Daniel Halpern, Gregory Kehne, and Yevgeniy Vorobeychik
W1
Fair Division Under Inaccurate Preferences PDF
Trung Dang, Daniel Halpern, Anuran Makur, Alexandros Psomas, Japneet Singh, and Paritosh Verma

J4
AI Alignment from Social Choice Perspectives PDF
Daniel Halpern, Evi Micha, Ariel D. Procaccia, Benjamin Schiffer, Itai Shapira, and Shirley Zhang
SIGecom Exchanges
J3
Representation with Incomplete Votes PDF
Daniel Halpern, Gregory Kehne, Ariel D. Procaccia, Jamie Tucker-Foltz, and Manuel Wüthrich
Theory and Decision
C25
Truthful Fair Division under Stochastic Valuations PDF
Daniel Halpern, Alexandros Psomas, and Shirley Zhang
EC 2026
C24
Robust AI Evaluation through Maximal Lotteries PDF
Hadi Khalaf, Serena Wang, Daniel Halpern, Itai Shapira, Flavio P. Calmon, and Ariel D. Procaccia
ICML 2026

J2
Dynamic Fair Division with Partial Information PDF
Gerdus Benadè, Daniel Halpern, and Alexandros Psomas
Operations Research
J1
Tracking Truth with Liquid Democracy PDF
Adam Berinsky, Daniel Halpern, Joseph Y. Halpern, Ali Jadbabaie, Elchanan Mossel, Ariel D. Procaccia, and Manon Revel
Management Science
C23
Pairwise Calibrated Rewards for Pluralistic Alignment PDF
Daniel Halpern, Evi Micha, Itai Shapira, and Ariel D. Procaccia
NeurIPS 2025
C22
Online Envy Minimization and Multicolor Discrepancy: Equivalences and Separations PDF
Daniel Halpern, Alexandros Psomas, Paritosh Verma, and Daniel Xie
EC 2025
C21
The Proportional Veto Principle for Approval Ballots PDF
Daniel Halpern, Ariel D. Procaccia, and Warut Suksompong
IJCAI 2025
C20
Federated Assemblies PDF
Daniel Halpern, Ariel D. Procaccia, Ehud Shapiro, and Nimrod Talmon
AAAI 2025 ★ Oral presentation (4.6% of submissions)

C19
Axioms for AI Alignment from Human Feedback PDF
Luise Ge, Daniel Halpern, Evi Micha, Ariel D. Procaccia, Itai Shapira, Yevgeniy Vorobeychik, and Junlin Wu
NeurIPS 2024 ★ Spotlight presentation (2.1% of submissions)
C18
Computing Voting Rules with Elicited Incomplete Votes PDF
Daniel Halpern, Safwan Hossain, and Jamie Tucker-Foltz
EC 2024
C17
On the Existence of Envy-Free Allocations Beyond Additive Valuations PDF
Gerdus Benadè, Daniel Halpern, Alexandros Psomas, and Paritosh Verma
EC 2024
C16
Metric Distortion with Elicited Pairwise Comparisons PDF
Soroush Ebadian, Daniel Halpern, and Evi Micha
IJCAI 2024
C15
Optimal Engagement-Diversity Tradeoffs in Social Media PDF
Fabian Baumann, Daniel Halpern, Iyad Rahwan, Itai Shapira, Ariel D. Procaccia, and Manuel Wüthrich
WWW 2024

C14
Strategyproof Voting under Correlated Beliefs PDF
Daniel Halpern, Rachel Li, and Ariel D. Procaccia
NeurIPS 2023
C13
Smoothed Analysis of Social Choice Revisited PDF
Bailey Flanigan, Daniel Halpern, and Alexandros Psomas
WINE 2023
C12
In Defense of Liquid Democracy PDF
Daniel Halpern, Joseph Y. Halpern, Ali Jadbabaie, Elchanan Mossel, Ariel D. Procaccia, and Manon Revel
EC 2023
C11
Representation with Incomplete Votes PDF
Daniel Halpern, Gregory Kehne, Ariel D. Procaccia, Jamie Tucker-Foltz, and Manuel Wüthrich
AAAI 2023

C10
Dynamic Fair Division with Partial Information PDF
Gerdus Benadè, Daniel Halpern, and Alexandros Psomas
NeurIPS 2022
C9
Liquid Democracy in Practice: An Empirical Analysis of its Epistemic Performance PDF
Manon Revel, Daniel Halpern, Adam Berinsky, and Ali Jadbabaie
EAAMO 2022
C8
Distortion in Voting with Top-t Preferences PDF
Allan Borodin, Daniel Halpern, Mohamad Latifian, and Nisarg Shah
IJCAI 2022
C7
Can Buyers Reveal for a Better Deal? PDF
Daniel Halpern, Gregory Kehne, and Jamie Tucker-Foltz
IJCAI 2022
C6
How Many Representatives Do We Need? The Optimal Size of an Epistemic Congress PDF
Manon Revel, Tao Lin, and Daniel Halpern
AAAI 2022

C5
Fair and Efficient Resource Allocation with Partial Information PDF
Daniel Halpern and Nisarg Shah
IJCAI 2021
C4
Aggregating Binary Judgments Ranked By Accuracy PDF
Daniel Halpern, Gregory Kehne, Dominik Peters, Ariel D. Procaccia, Nisarg Shah, and Piotr Skowron
AAAI 2021
U1
Unbiased Information Packets PDF
Daniel Halpern and Ariel D. Procaccia
Unpublished manuscript

C3
Fair Division with Binary Valuations: One Rule to Rule Them All PDF
Daniel Halpern, Ariel D. Procaccia, Alexandros Psomas, and Nisarg Shah
WINE 2020
C2
Resolving the Optimal Metric Distortion Conjecture PDF
Vasilis Gkatzelis, Daniel Halpern, and Nisarg Shah
FOCS 2020 ★ Invited to the EC 2021 plenary session: Highlights Beyond EC