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cs.GT2025
Fisher Meets Lindahl: A Unified Duality Framework for Market Equilibrium
Yixin Tao, Weiqiang Zheng
The Fisher market equilibrium for private goods and the Lindahl equilibrium for public goods are classic and fundamental solution concepts for market equilibria. While Fisher marke…
cs.GT2025
Pay for The Second-Best Service: A Game-Theoretic Approach Against Dishonest LLM Providers
Yuhan Cao, Yu Wang, Sitong Liu +3
The widespread adoption of Large Language Models (LLMs) through Application Programming Interfaces (APIs) induces a critical vulnerability: the potential for dishonest manipulation…
cs.GT2025
Tight Efficiency Bounds for the Probabilistic Serial and Related Mechanisms
Jugal Garg, Yixin Tao, László A. Végh
The Probabilistic Serial (PS) mechanism -- also known as the simultaneous eating algorithm -- is a canonical solution for the random assignment problem under ordinal preferences. I…