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The extensive nature of group quality
Kenna R., Berche B.
EPL 90 (2010) 58002
DOI : 10.1209/0295-5075/90/58002
ArXiv : arxiv:1004.3155 [PDF]
HAL : hal-00519928

We consider groups of interacting nodes engaged in an activity as many-body, complex systems and analyse their cooperative behaviour from a mean-field point of view. We show that inter-nodal interactions rather than accumulated individual node strengths dominate the quality of group activity, and give rise to phenomena akin to phase transitions, where the extensive relationship between group quality and quantity reduces. The theory is tested using empirical data on quantity and quality of scientific research groups, for which critical masses are determined.



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