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The role of space, density and migration in social dilemmas
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Bara, Jacques, Santos, Fernando P. and Turrini, Paolo (2023) The role of space, density and migration in social dilemmas. In: The 22nd International Conference on Autonomous Agents and Multiagent Systems, London, UK, 29 May - 02 Jun 2023. Published in: AAMAS '23: Proceedings of the 2023 International Conference on Autonomous Agents and Multiagent Systems pp. 625-633. doi:10.5555/3545946.3598692 (In Press)
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Official URL: https://dl.acm.org/doi/abs/10.5555/3545946.3598692
Abstract
Cooperation in multi-agent systems often entails a social dilemma. Cooperators pay a cost to improve public goods whereas defectors free-ride, reaping benefits without incurring any costs or even producing public bads. Much attention has been devoted to under-standing cooperation in populations where agents interact with random peers (well-mixed), interact over complex networks, or interact in fixed spatial positions. In spatial settings with mobile agents, however, the effects of cooperation are circumscribed to arbitrary neighbourhoods and the stability of cooperation depends on individuals’ capacity to move between sites and form dense clusters. In this paper we study spatial public goods games in which agents either pollute (defectors) or clean (cooperators) their local area and can migrate to empty sites within range. We ask whether migration promotes cooperation and reduces the negative impacts of defection. Analytically and through agent-based simulations, we show that migration ultimately reduces the pollution felt per-capita in at least two ways: 1) polluters encourage eco-friendly neighbours to migrate away, eventually clustering with other cooperators 2)migration stabilises cooperation in dense population scenarios. Our results reveal a complex interaction between migration and density as key factors to promote cooperation in spatial social dilemmas.
Item Type: | Conference Item (Paper) | ||||||
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Subjects: | H Social Sciences > HB Economic Theory Q Science > QA Mathematics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||||
Library of Congress Subject Headings (LCSH): | Free rider problem (Economics), Game theory, Cooperation | ||||||
Journal or Publication Title: | AAMAS '23: Proceedings of the 2023 International Conference on Autonomous Agents and Multiagent Systems | ||||||
Publisher: | ACM | ||||||
Official Date: | 30 May 2023 | ||||||
Dates: |
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Page Range: | pp. 625-633 | ||||||
DOI: | 10.5555/3545946.3598692 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | In Press | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 22 March 2023 | ||||||
Date of first compliant Open Access: | 23 March 2023 | ||||||
RIOXX Funder/Project Grant: |
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Conference Paper Type: | Paper | ||||||
Title of Event: | The 22nd International Conference on Autonomous Agents and Multiagent Systems | ||||||
Type of Event: | Conference | ||||||
Location of Event: | London, UK | ||||||
Date(s) of Event: | 29 May - 02 Jun 2023 | ||||||
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