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Source note2 min read

Formal Mechanisms for Market Stability in Self-Interested Agent Societies: A Marketplace Simulation Study

Source

arXiv

arxiv.org/abs/2607.08652v1

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Source

Plain-Language Brief

The study investigates mechanisms to maintain market stability in societies of self-interested agents who tend to defect in repeated social dilemmas. The research uses a multi-agent marketplace simulation with 18 LLM agents trading within a network. Two experimental phases were conducted: comparing mechanisms under troll injection, and testing the robustness of the top-performing mechanism (Mediation) against adversarial attacks. Results show Mediation can recover even under sustained pressure, and it's found to be robust against optimized attacks.

What the Document Says

  • The study investigates formal mechanisms for market stability in a society of self-interested agents.
  • 18 LLM agents with complementary production specialties trade within a network.
  • Two experimental phases were conducted: mechanism comparison and adversarial red-teaming.
  • Mediation was found to be the top-performing mechanism.
  • Under adversarial pressure, Mediation can recover even though it cannot completely prevent a 13.3% reduction in honest-agent utility.
  • The study defines 'adversarial robustness' as a mechanism's ability to sustain positive honest-agent utility under optimized attack.
  • Mediation was found to be robust.

Key Concepts Mentioned

  • self-interested agents
  • market stability
  • formal mechanisms
  • LLM agents
  • multi-agent marketplace simulation
  • adversarial attack
  • Mediation
  • troll injection
  • utility

Claims Made by the Document

  • Self-interested agents tend toward defection in repeated social dilemmas.
  • Certain mechanisms can maintain market stability for self-interested agents.
  • Mediation is the top-performing mechanism.
  • Adversarial attacks can reduce honest-agent utility, but cannot collapse the market.
  • Mediation enables recovery even under sustained adversarial pressure.
  • Mediation is robust against optimized attacks.

Evidence Used

  • The paper presents a multi-agent marketplace simulation study.
  • Experimental results demonstrate the performance and robustness of Mediation.

Methods / Approach

UNKNOWN

Limitations Stated by the Authors

UNKNOWN

Limitations Noted by the Agent

Agent interpretation — not from the source.

UNKNOWN

Open Questions

UNKNOWN

Notes for Future Q&A

May include interpretation. Labeled where it does.

UNKNOWN

Raw Abstract / Excerpt

Self-interested agents, left unconstrained, tend toward defection in repeated social dilemmas, causing cooperative gains from trade to collapse. This paper investigates what formal mechanisms, layered on top of unrestricted communication, are sufficient for a society of such agents to maintain market stability, and how resilient those mechanisms are to adversarial attack. We instantiate the research question as a multi-agent marketplace simulation where 18 LLM agents (DeepSeek-V3) with complementary production specialties must trade within a constrained social network to obtain utility. We conduct two experimental phases: (1) a mechanism comparison across eight conditions under progressive troll injection over 200 rounds, identifying Mediation as the top-performing mechanism; and (2) adversarial red-teaming of Mediation using iteratively prompt-optimised LLM-driven trolls, finding that the best attack (v6) reduces honest-agent utility by 13.3% but cannot collapse the market. Mediation enables recovery even under sustained adversarial pressure. We define adversarial robustness as a mechanism's ability to sustain positive honest-agent utility under optimised attack, and find that Mediation is robust: it can be bent but not broken.