TY  - JOUR
AV  - none
ID  - eprints1097
TI  - Taxonomy and clustering in collaborative systems: the case of the on-line encyclopedia Wikipedia
UR  - http://dx.doi.org/10.1209/0295-5075/81/28006
IS  - 2
KW  - PACS: 89.75.Hc Networks and genealogical trees; 89.75.Fb Structures and organization in complex systems; 89.75.-k Complex systems
N2  - In this paper we investigate the nature and structure of the relation between imposed classifications and real clustering in a particular case of a scale-free network given by the on-line encyclopedia Wikipedia. We find a statistical similarity in the distributions of community sizes both by using the top-down approach of the categories division present in the archive and in the bottom-up procedure of community detection given by an algorithm based on the spectral properties of the graph. Regardless of the statistically similar behaviour, the two methods provide a rather different division of the articles, thereby signaling that the nature and presence of power laws is a general feature for these systems and cannot be used as a benchmark to evaluate the suitability of a clustering method.
JF  - EPL (Europhysics Letters)
SN  - 0295-5075      
PB  - IOPscience
VL  - 81
Y1  - 2008/01//
A1  - Capocci, Andrea
A1  - Rao, Francesco
A1  - Caldarelli, Guido
ER  -