Publication
The dynamics of casual groups can keep free-riders at bay
| dc.contributor.author | Fontanari, José F. | |
| dc.contributor.author | Santos, Mauro | |
| dc.date.accessioned | 2024-06-28T15:29:06Z | |
| dc.date.available | 2025-06-01T00:31:33Z | |
| dc.date.issued | 2024-06-28 | |
| dc.description.abstract | Understanding the conditions for maintaining cooperation in groups of unrelated individuals despite the presence of non-cooperative members is a major research topic in contemporary biological, sociological, and economic theory. The $N$-person snowdrift game models the type of social dilemma where cooperative actions are costly, but there is a reward for performing them. We study this game in a scenario where players move between play groups following the casual group dynamics, where groups grow by recruiting isolates and shrink by losing individuals who then become isolates. This describes the size distribution of spontaneous human groups and also the formation of sleeping groups in monkeys. We consider three scenarios according to the probability of isolates joining a group. We find that for appropriate choices of the cost-benefit ratio of cooperation and the aggregation-disaggregation ratio in the formation of casual groups, free-riders can be completely eliminated from the population. If individuals are more attracted to large groups, we find that cooperators persist in the population even when the mean group size diverges. We also point out the remarkable similarity between the replicator equation approach to public goods games and the trait group formulation of structured demes. | pt_PT |
| dc.description.version | info:eu-repo/semantics/acceptedVersion | pt_PT |
| dc.identifier.citation | Fontanari, José F. & Mauro Santos. 2024. The dynamics of casual groups can keep free-riders at bay. Mathematical Biosciences 372:109188 | pt_PT |
| dc.identifier.doi | 10.1016/j.mbs.2024.109188 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10451/65178 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Elsevier | pt_PT |
| dc.relation | JFF is partially supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil grant number 305620/2021-5 | pt_PT |
| dc.relation | MS is funded by grant PID2021-127107NB-I00 from Ministerio de Ciencia e Innovación (Spain), grant 2021 SGR 00526 from Generalitat de Catalunya, Spain, and the Distinguished Guest Scientists Fellowship Programme of the Hungarian Academy of Sciences | pt_PT |
| dc.title | The dynamics of casual groups can keep free-riders at bay | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.startPage | 109188 | pt_PT |
| oaire.citation.title | Mathematical Biosciences | pt_PT |
| oaire.citation.volume | 372 | pt_PT |
| person.familyName | Santos | |
| person.givenName | Mauro | |
| person.identifier.ciencia-id | 6A12-5321-627A | |
| person.identifier.orcid | 0000-0002-6478-6570 | |
| rcaap.embargofct | O tipo de licença envolvido com a editora Elsevier para esta revista, não envolvendo pagamento (APC), apenas permite acesso em repositório público do formato 'aceite' (i.e não editado e paginado pela editora) após período de embargo de12 meses após a data da sua publicação final. | pt_PT |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | 215be051-54a0-45ec-b3d0-f76c7d3519fc | |
| relation.isAuthorOfPublication.latestForDiscovery | 215be051-54a0-45ec-b3d0-f76c7d3519fc |