Prosperity is Associated with Instability in Dynamical Networks

Prosperity is Associated with Instability in Dynamical Networks

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Prosperity is Associated with Instability in Dynamical Networks

dc.contributor.author	Cavaliere, Matteo
dc.contributor.author	Sedwards, Sean
dc.contributor.author	Csikász-Nagy, Attila
dc.contributor.author	Tarnita, Corina Elena
dc.contributor.author	Nowak, Martin A.
dc.date.accessioned	2012-03-05T17:09:53Z
dc.date.issued	2012
dc.identifier.citation	Cavaliere, Matteo, Sean Sedwards, Corina Elena Tarnita, Martin A. Nowak, and Attila Csikász-Nagy. Forthcoming. Prosperity is associated with instability in dynamical networks. Journal of Theoretical Biology.	en_US
dc.identifier.issn	0022-5193	en_US
dc.identifier.issn	1095-8541	en_US
dc.identifier.uri	http://nrs.harvard.edu/urn-3:HUL.InstRepos:8311705
dc.description.abstract	Social, biological and economic networks grow and decline with occasional fragmentation and re-formation, often explained in terms of external perturbations. We show that these phenomena can be a direct consequence of simple imitation and internal conflicts between ‘cooperators’ and ‘defectors’. We employ a game-theoretic model of dynamic network formation where successful individuals are more likely to be imitated by newcomers who adopt their strategies and copy their social network. We find that, despite using the same mechanism, cooperators promote well-connected highly prosperous networks and defectors cause the network to fragment and lose its prosperity; defectors are unable to maintain the highly connected networks they invade. Once the network is fragmented it can be reconstructed by a new invasion of cooperators, leading to the cycle of formation and fragmentation seen, for example, in bacterial communities and socio-economic networks. In this endless struggle between cooperators and defectors we observe that cooperation leads to prosperity, but prosperity is associated with instability. Cooperation is prosperous when the network has frequent formation and fragmentation.	en_US
dc.description.sponsorship	Mathematics	en_US
dc.description.sponsorship	Other Research Unit	en_US
dc.language.iso	en_US	en_US
dc.publisher	Elsevier	en_US
dc.relation.isversionof	doi:10.1016/j.jtbi.2011.09.005	en_US
dc.relation.hasversion	http://arxiv.org/abs/1102.4947	en_US
dash.license	OAP
dc.subject	evolutionary game theory	en_US
dc.subject	network dynamics	en_US
dc.subject	imitation	en_US
dc.subject	evolution of cooperation	en_US
dc.subject	network formation and fragmentation	en_US
dc.subject	populations and evolution	en_US
dc.title	Prosperity is Associated with Instability in Dynamical Networks	en_US
dc.type	Journal Article	en_US
dc.description.version	Author's Original	en_US
dc.relation.journal	Journal of Theoretical Biology	en_US
dash.depositing.author	Nowak, Martin A.
dc.date.available	2012-03-05T17:09:53Z