Growing network model for community with group structure

Details Growing network model for community with group structure Growing network model for community with group structure

2004-12-07

arxiv.org/abs/cond-mat/0412149v2

PRE 71 036131 (2005)

Physics

Condensed Matter

Other Condensed Matter

5 figures and 1 table

Scientific paper

10.1103/PhysRevE.71.036131

We propose a growing network model for a community with a group structure. The community consists of individual members and groups, gatherings of members. The community grows as a new member is introduced by an existing member at each time step. The new member then creates a new group or joins one of the groups of the introducer. We investigate the emerging community structure analytically and numerically. The group size distribution shows a power law distribution for a variety of growth rules, while the activity distribution follows an exponential or a power law depending on the details of the growth rule. We also present an analysis of empirical data from on the online communities, the ``Groups'' in \url{http://www.yahoo.com} and the ``Cafe'' in \url{http://www.daum.net}, which shows a power law distribution for a wide range of group sizes.

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