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This volume constitutes the refereed proceedings of 18th International Symposium on Algorithmic Game Theory, SAGT 2025, held in Bath, UK, during September 2-5, 2025.
The 26 full papers included in this book were carefully reviewed and selected from 68 submissions. They were organized in topical sections as follows:Computational and Algorithmic Aspects of Games; Facility Location; Fair Division and Resource Allocation; Markets and Matching; Bayesian Decision Making; Mechanism Design and Algorithmic Contracts and Computational Social Choice.
.- Computational and Algorithmic Aspects of Games. .- On the Limitations and Possibilities of Nash Regret Minimization inZero-Sum Matrix Games under Noisy Feedback..- On the Effect of Time Preferences on the Price of Anarchy..- Mixed Nash Equilibria in Discrete Tullock Contests..- Social Welfare in Battery Charging Games..- Improved Hardness Results for the Clearing Problem in Financial Networks with Credit Default Swaps..- Coordination Mechanisms on Unrelated Machines with Arbitrary Priority Lists. .- Facility Location. .- Constant-Approximate and Constant-Strategyproof Two-Facility Location..- Constrained Truthful Obnoxious Two-Facility Location with Optional Preferences..- Hotelling-Downs with Facility Synergy: The Mall Effect. .- Fair Division and Resource Allocation. .- Tractable Graph Structures in EFX Orientation..- Fairness under Equal-Sized Bundles: Impossibility results and Approximation Guarantees..- Online Fair Division for Personalized 2-Value Instances..- A new lower bound for multi-color discrepancy with applications to fair division..- When is Truthfully Allocating Chores no Harder than Goods?. .- Markets and Matching. .- Unsolvability and Beyond in Many-To-Many Non-Bipartite Stable Matching..- Course Allocation with Credits via Stable Matching. .- Bayesian Decision Making. .- Bayesian Optimal Stopping with Maximum Value Knowledge..- Persuading Agents in Opinion Formation Games..- A Truthful and Accurate Forecasting Competition Mechanism on Bayesian Network Structured Events. .- Mechanism Design and Algorithmic Contracts. .- Deterministic Refund Mechanisms..- Near-Linear MIR Algorithms for Stochastically-Ordered Priors..- Online Budget-Feasible Mechanism Design with Predictions..- Linear Contracts for Supermodular Functions Based on Graphs. .- Computational Social Choice. .- Distortion of Multi-Winner Elections on the Line Metric: The Polar Comparison Rule..- Metric Distortion under Group-Fair Objectives..- Robustness of voting mechanisms to external information.
