Preferential attachment in the growth of social networks: the case of Wikipedia

Details Preferential attachment in the growth of social networks: the case of Wikipedia Preferential attachment in the growth of social networks: the case of Wikipedia

2006-02-04

arxiv.org/abs/physics/0602026v2

Physics

Physics and Society

4 pages, 4 figures, revtex

Scientific paper

10.1103/PhysRevE.74.036116

We present an analysis of the statistical properties and growth of the free on-line encyclopedia Wikipedia. By describing topics by vertices and hyperlinks between them as edges, we can represent this encyclopedia as a directed graph. The topological properties of this graph are in close analogy with that of the World Wide Web, despite the very different growth mechanism. In particular we measure a scale--invariant distribution of the in-- and out-- degree and we are able to reproduce these features by means of a simple statistical model. As a major consequence, Wikipedia growth can be described by local rules such as the preferential attachment mechanism, though users can act globally on the network.

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