SPIN Unprocessed October 22, 2026 ai_technology research
Is Anyone Enforcing the Cartel? What Reinforcement Learning Teaches LLM Agents in Markets
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arXiv:2610.28787v1 Announce Type: new Abstract: Evaluations of large language model (LLM) agents report that pricing agents collude at others' expense. Yet collusion is defined by enforcement: a cartel, in which competitors share monopoly profits, holds only if a member who cheats is punished. We introduce an audit that tests enforcement by forcing a member to cheat in counterfactual copies of a market, and use it to study what reinforcement learning (RL) teaches agents in pricing and trading. S
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