The extensive nature of group quality

Ralph Kenna, B. Berche

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)
    43 Downloads (Pure)


    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 the quantity and quality of scientific research groups, for which critical masses are determined.
    Original languageEnglish
    Article number58002
    JournalEurophysics Letters
    Issue number5
    Publication statusPublished - 2 Jul 2010


    • education and communication
    • statistical physics and nonlinear systems
    • complex systems


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