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SOE: Fachverband Physik sozio-ökonomischer Systeme

SOE 5: Agent-Based Modeling

SOE 5.1: Vortrag

Dienstag, 18. März 2025, 12:15–12:30, H45

Co-evolving networks for opinion and social dynamics in agent-based models — •Soeren Nagel², Quang Nuh Vu¹, and Nataša Djurdjevac Conrad¹ — ¹Zuse Institue Berlin — ²Department of Mathematics and Computer Science, Institute of Computer Science, Freie Universität Berlin

The coevolution of public opinions and social interactions is a fundamental aspect of social systems, yet existing models often fail to include this feedback loop. While many studies explore how opinions influence social ties, The reversed influence is however often overlooked. To bridge this gap, we introduce a novel stochastic agent-based model (ABM) that integrates opinion dynamics and social mobility within a shared "social space."

The feedback loop between opinion and social dynamics generates emergent phenomena such as consensus and echo chambers, whose dynamics we analyze through a network-based order parameter. The model exhibits critical transitions for both noise intensity and relative size of opinion and social network.

Our findings demonstrate the potential of coevolutionary models to capture the transient dynamics of social clustering and opinion polarization.

Applying the model to empirical data from the General Social Survey, we investigate opinion distributions on politically charged issues, and demonstrate, that the model is capable of capturing real-world dynamics.

Keywords: Opinion Dynamics; Agent-Based Model; Phase Transitions