Socioeconomic agents as active matter in nonequilibrium Sakoda-Schelling models

Ruben Zakine, Jerome Garnier-Brun, Antoine-Cyrus Becharat and Michael Benzaquen

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Abstract: How robust are socioeconomic agent-based models with respect to the details of the agents' decision rule? We tackle this question by considering an occupation model in the spirit of the Sakoda-Schelling model, historically introduced to shed light on segregation dynamics among human groups. For a large class of utility functions and decision rules, we pinpoint the nonequilibrium nature of the agent dynamics, while recovering the equilibrium-like phase separation phenomenology. Within the mean field approximation we show how the model can be mapped, to some extent, onto an active matter field description. Finally, we consider non-reciprocal interactions between two populations, and show how they can lead to non-steady macroscopic behavior. We believe our approach provides a unifying framework to further study geography-dependent agent-based models, notably paving the way for joint consideration of population and price dynamics within a field theoretic approach.

Date: 2023-07, Revised 2024-06
New Economics Papers: this item is included in nep-hme
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Persistent link: https://EconPapers.repec.org/RePEc:arx:papers:2307.14270

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