Learning to Mitigate AI Collusion on Economic Platforms

no code implementations • 15 Feb 2022 • Gianluca Brero, Nicolas Lepore, Eric Mibuari, David C. Parkes

Algorithmic pricing on online e-commerce platforms raises the concern of tacit collusion, where reinforcement learning algorithms learn to set collusive prices in a decentralized manner and through nothing more than profit feedback.

reinforcement-learning Reinforcement Learning (RL)

Reinforcement Learning of Sequential Price Mechanisms

no code implementations • 2 Oct 2020 • Gianluca Brero, Alon Eden, Matthias Gerstgrasser, David C. Parkes, Duncan Rheingans-Yoo

We introduce the use of reinforcement learning for indirect mechanisms, working with the existing class of sequential price mechanisms, which generalizes both serial dictatorship and posted price mechanisms and essentially characterizes all strongly obviously strategyproof mechanisms.

reinforcement-learning Reinforcement Learning (RL)

A Bayesian Clearing Mechanism for Combinatorial Auctions

no code implementations • 14 Dec 2017 • Gianluca Brero, Sébastien Lahaie

We cast the problem of combinatorial auction design in a Bayesian framework in order to incorporate prior information into the auction process and minimize the number of rounds to convergence.