Algorithmic Game Theory

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.