Emergent Social Dynamics of LLM Agents in the El Farol Bar Problem

• URL: http://arxiv.org/abs/2509.04537v3
• Date: Wed, 17 Sep 2025 13:45:52 GMT
• Title: Emergent Social Dynamics of LLM Agents in the El Farol Bar Problem
• Authors: Ryosuke Takata, Atsushi Masumori, Takashi Ikegami,
• Abstract summary: We investigate the emergent social dynamics of Large Language Model (LLM) agents in a spatially extended El Farol Bar problem.<n>As a result, the LLM agents generated a spontaneous motivation to go to the bar and changed their decision making by becoming a collective.<n>These findings suggest that a new model of group decision making, which could not be handled in the previous game-theoretic problem setting, can be realized by LLM agents.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the emergent social dynamics of Large Language Model (LLM) agents in a spatially extended El Farol Bar problem, observing how they autonomously navigate this classic social dilemma. As a result, the LLM agents generated a spontaneous motivation to go to the bar and changed their decision making by becoming a collective. We also observed that the LLM agents did not solve the problem completely, but rather behaved more like humans. These findings reveal a complex interplay between external incentives (prompt-specified constraints such as the 60% threshold) and internal incentives (culturally-encoded social preferences derived from pre-training), demonstrating that LLM agents naturally balance formal game-theoretic rationality with social motivations that characterize human behavior. These findings suggest that a new model of group decision making, which could not be handled in the previous game-theoretic problem setting, can be realized by LLM agents.

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