Strategic Formation of Credit Networks

P Dandekar, A Goel, MP Wellman, and B Wiedenbeck ACM Transactions on Internet Technology 15(1): 3:1–3:41, 2015. Abstract Credit networks are an abstraction for modeling trust among agents in a network. Agents who do not directly trust each…

Trading Agents

MP Wellman Morgan & Claypool Publishers, Synthesis Lectures on Artificial Intelligence and Machine Learning Abstract Automated trading in electronic markets is one of the most common and consequential applications of autonomous software…

Asset pricing under ambiguous information: An empirical game-theoretic analysis

B-A Cassell and MP Wellman Computational and Mathematical Organization Theory 18:445–462, 2012 preliminary version presented at SpringSim Agent-Directed Simulation Symposium, April 2011. Abstract In a representative agent model, the…

Stronger CDA Strategies through Empirical Game-Theoretic Analysis and Reinforcement Learning

We present a general methodology to automate the search for equilibrium strategies in games derived from computational experimentation. Our approach interleaves empirical game-theoretic analysis with reinforcement learning. We apply this methodology to the classic Continuous Double Auction game, conducting the most comprehensive CDA strategic study published to date. Empirical game analysis confirms prior findings about the relative performance of known strategies. Reinforcement learning derives new bidding strategies from the empirical equilibrium environment. Iterative application of this approach yields strategies stronger than any other published CDA bidding policy, culminating in a new Nash equilibrium supported exclusively by our learned strategies.