Cooperative Game Theory

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1 paper in the last four weeks, with none the four weeks before. 0.0% of all new papers.

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Rethinking Least-Core Computation in Contextual-Distractor Games
Oct 5, 2026Hiroshi Kera, Toshinori Yamauchi, Sai Ganesh NagarajanCooperative Game Theory Feature Attribution
Chiba University; National Institute of Informatics · University of Southern Denmark, IMADA
Reputation, Strategy, and Emotion Effects on Generative AI Cooperation: A Comparison Across Reasoning and Non-Reasoning Models
Oct 1, 2026Celso de Melo, Zishan Feng, James Hale +3Cooperative Game Theory Large Language Model-Based Social Simulation
DEVCOM Army Research Laboratory, USA · Department of Electrical, Electronic and Computer Engineering, Gifu University, Japan · Department of Computer Science, University of Southern California, USA +1
Emergence of Reputation-Based Cooperation in LLM Agents
Aug 5, 2026Kazuya Horibe, Kenji Itao, Wataru ToyokawaCooperative Game Theory Multi-Agent LLMs
RIKEN · RIKNE
A game theory for foundation models shows new paths to rational cooperation through similarity inference
Aug 4, 2026Alexander Meulemans, Maciej Wołczyk, Marissa A. Weis +11Cooperative Game Theory Game Theory
Google, Paradigms of Intelligence Team · Mila - Quebec AI Institute · Université de Montréal +6
Stable and Budget-Feasible Coalition Formation for Clustered Federated Learning: A Hedonic Potential-Game Approach
Jul 29, 2026Cengis HasanCooperative Game Theory Clustering
Cognifinity, Luxembourg
Dynamic Coalition Formation and Communication Pricing in Skill-Based Agentic AI Systems
Jul 24, 2026Mojtaba EslamiMulti-Agent System Optimization Cooperative Game Theory
University of Calgary
Nonlinear Axiomatic Attribution for Cooperative Games
Jul 10, 2026Weida Li, Zhuanghua Liu, Yaoliang Yu +1Cooperative Game Theory Feature Attribution
Department of Computer Science, National University of Singapore, Republic of Singapore · School of Computer Science, University of Waterloo, Canada · Vector Institute, Canada
Exit-and-Join Dynamics and Equilibrium in Continuum Cooperative Games
Jun 27, 2026Quanyan ZhuCooperative Game Theory Shapley Value Attribution
Department of Electrical and Computer Engineering · New York University Tandon School of Engineering · Brooklyn, NY, USA
Parametric Open Source Games
Jun 25, 2026Aleksandar Todorov, Jesse ten Napel, Alexander MüllerNash Equilibrium Cooperative Game Theory
University of Groningen, Groningen, the Netherlands · Safe AI Netherlands
Beyond Shapley: Efficient Computation of Asymmetric Shapley Values
Jun 23, 2026Ezequiel Companeetz, Santiago Cifuentes, Sergio AbriolaCooperative Game Theory Feature Attribution
Departamento de Computación, Facultad de Ciencias Exactas y Naturales, UBA · Instituto de Ciencias de la Computación (ICC), CONICET
Multiscale Exit-Join Dynamics: Tactical Consensus and Strategic Coalition Formation
Jun 19, 2026Quanyan ZhuCooperative Game Theory Multi-Agent Coordination
Department of Electrical and Computer Engineering New York University Tandon School of Engineering Brooklyn, NY, USA
Exit-and-Join Dynamics for Decentralized Coalition Formation
Jun 18, 2026Quanyan ZhuCooperative Game Theory Potential Games
Department of Electrical and Computer Engineering New York University Tandon School of Engineering Brooklyn, NY, USA
Agents that Matter: Optimizing Multi-Agent LLMs via Removal-Based Attribution
May 26, 2026Mingyu Lu, Yushan Huang, Chris Lin +1Multi-Agent System Optimization Cooperative Game Theory
Paul G. Allen School of Computer Science & Engineering, University of Washington
Rethinking Weakly-supervised Video Temporal Grounding From a Game Perspective
May 26, 2026Xiang Fang, Zeyu Xiong, Wanlong Fang +7Temporal Video Grounding Cooperative Game Theory
Hubei Key Laboratory of Distributed System Security, Hubei Engineering Research Center on Big Data Security, School of Cyber Science and Engineering, Huazhong University of Science and Technology · University of Central Florida · Zhejiang Gongshang University +3
Nash Welfare in Additively Separable Hedonic Games
May 18, 2026Marta Pagano, Alexander SchlengaCooperative Game Theory Game Theory
Sapienza University of Rome, Italy · Technical University of Munich, Germany
Semantic Cooperative Games for Contribution Attribution in LLM-Based Multi-Agent Systems
May 14, 2026Pengyi Jiang, Xiaoguang Zhu, Quanyan ZhuMulti-Agent LLM Systems Cooperative Game Theory
New York University · University of California, Davis
In-Context Credit Assignment via the Core
May 7, 2026Keegan Harris, Siddharth Prasad, Asher TrockmanCooperative Game Theory Credit Assignment
UC Berkeley · Toyota Technological Institute at Chicago · Google Research
QuadraSHAP: Stable and Scalable Shapley Values for Product Games via Gauss-Legendre Quadrature
May 7, 2026Majid Mohammadi, Grigory Reznikov, Pavel Sinitcyn +2Cooperative Game Theory Feature Attribution
AI Technology for Life, Information and Computing Sciences, Utrecht University, The Netherlands · Biomolecular Mass Spectrometry and Proteomics, Pharmaceutical Sciences, Utrecht University, The Netherlands · Rational Intelligence Lab, CISPA Helmholtz Center for Information Security, Germany +1
Meritocratic Fairness in Budgeted Combinatorial Multi-armed Bandits via Shapley Values
May 1, 2026Shradha Sharma, Swapnil Dhamal, Shweta JainMulti-Armed Bandits Cooperative Game Theory
Indian Institute of Technology Ropar
A Collective Variational Principle Unifying Bayesian Inference, Game Theory, and Thermodynamics
Apr 30, 2026Djamel Bouchaffra, Faycal Ykhlef, Mustapha Lebbah +1Nash Equilibrium Cooperative Game Theory
1DAVID Lab, University of Paris-Saclay, UVSQ, 78035 Versailles, France. · 2TSAM, ASM, Centre for Development of Advanced Technologies, Algiers, Algeria. · 3LIPN, UMR CNRS 7030, Sorbonne Paris Nord University, Villetaneuse, France.
From Necklaces to Coalitions: Fair and Self-Interested Distribution of Coalition Value Calculations
Apr 18, 2026Terry R. Payne, Luke RileyCooperative Game Theory Multi-Agent Coordination
School of Computer Science and Informatics, University of Liverpool, Liverpool, UK. · Quant, London, UK.
The Price of Paranoia: Robust Risk-Sensitive Cooperation in Non-Stationary Multi-Agent Reinforcement Learning
Apr 17, 2026Deep Kumar Ganguly, Chandradithya S Jonnalagadda, Pratham Chintamani +1Cooperative Game Theory Multi-Agent Coordination
Technical University of Munich (TU Munich) · Brown University · Indian Institute of Technology Tirupati (IIT Tirupati)
CoopEval: Benchmarking Cooperation-Sustaining Mechanisms and LLM Agents in Social Dilemmas
Apr 16, 2026Emanuel Tewolde, Xiao Zhang, David Guzman Piedrahita +2Social Dilemmas Cooperative Game Theory
Carnegie Mellon University · Foundations of Cooperative AI Lab (FOCAL) · Jinesis Lab, University of Toronto & Vector Institute +3
Fairness-Aware Performance Evaluation for Multi-Party Multi-Objective Optimization
Jan 30, 2026Zifan Zhao, Peilan Xu, Wenjian LuoCooperative Game Theory Algorithmic Fairness
School of Artificial Intelligence, Nanjing University of Information Science and Technology, Nanjing 210044, China · Guangdong Provincial Key Laboratory of Novel Security Intelligence Technologies, Institute of Cyberspace Security, School of Computer Science and Technology, Harbin Institute of Technology, Shenzhen 518055, China
Who Gets the Reward & Who Gets the Blame? Evaluation-Aligned Training Signals for Multi-LLM Agents
Nov 11, 2025Chih-Hsuan, Yang, Tanwi Mallick +5Multi-Agent LLM Systems Cooperative Game Theory
Bella · Argonne National Laboratory · & University of Chicago
Non-Obvious Manipulability in Additively Separable and Fractional Hedonic Games
May 19, 2025Diodato Ferraioli, Maria Fomenko, Giovanna VarricchioCooperative Game Theory Mechanism Design
University of Salerno, Italy · University of Calabria, Italy
Neural Dynamic Data Valuation via Stochastic State-Adjoint Trajectories
Apr 30, 2024Zhangyong Liang, Ji Zhang, Huanhuan GaoCooperative Game Theory Game Theory
National Center for Applied Mathematics Tianjin University Tianjin 300072, China · School of Mathematics, Physics and Computing University of Southern Queensland Toowoomba, Queensland 4350, Australia · School of Mechanical and Aerospace Engineering Jilin University Changchun 130025, China

Oct 5, 2026, cs.LGJ/K move · Enter open · S save

Rethinking Least-Core Computation in Contextual-Distractor Games

Hiroshi Kera, Toshinori Yamauchi, Sai Ganesh Nagarajan

Chiba University; National Institute of Informatics · University of Southern Denmark, IMADA

Cooperative Game Theory Feature Attribution

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Game-theoretic attribution explains a model by assigning credit to its features or training examples. The least core has attracted interest as an alternative to Shapley-style averaging because it can expose players that cause substantial harm in rare, high-value contexts. However, least-core allocations are generally nonunique, and the choice of allocation can affect the resulting explanation. In this study, we investigate how payoff selection and coalition sampling affect least-core attribution. Our experiments show that selector choice matters for distinguishing useful and harmful contributions, and that sampling can degrade harmful-player identification across the tested selectors even when useful players remain well identified. These observations motivate efficient computation with all coalition constraints and a well-defined selector. We introduce entropic least core (ELC), a smooth approximation whose unique minimizer follows a continuous path along the temperature to the nucleolus, a classical refinement of the least core. Our experiments show that ELC approximates the nucleolus faster than an LP-based nucleolus solver while retaining small payoff errors, with further GPU acceleration at larger problem sizes. In the tested full-coalition contextual-distractor games, ELC matches the minimum-norm selector in identification accuracy and more accurately ranks distractors by harm.

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