%0 Journal Article %T A measure of centrality based on the network efficiency %A Vito Latora %A Massimo Marchiori %J Physics %D 2004 %I arXiv %X We introduce a new measure of centrality, the information centrality C^I, based on the concept of efficient propagation of information over the network. C^I is defined for both valued and non-valued graphs, and applies to groups and classes as well as individuals. The new measure is illustrated and compared to the standard centrality measures by using a classic network data set. %U http://arxiv.org/abs/cond-mat/0402050v1