relation: http://eprints.imtlucca.it/1091/ title: On the rich-club effect in dense and weighted networks creator: Zlatic, Vinko creator: Bianconi, Ginestra creator: Díaz-Guilera, Albert creator: Garlaschelli, Diego creator: Rao, Francesco creator: Caldarelli, Guido subject: QC Physics description: For many complex networks present in nature only a single instance, usually of large size, is available. Any measurement made on this single instance cannot be repeated on different realizations. In order to detect significant patterns in a real-world network it is therefore crucial to compare the measured results with a null model counterpart. Here we focus on dense and weighted networks, proposing a suitable null model and studying the behaviour of the degree correlations as measured by the rich-club coefficient. Our method solves an existing problem with the randomization of dense unweighted graphs, and at the same time represents a generalization of the rich-club coefficient to weighted networks which is complementary to other recently proposed ones. date: 2009 type: Article type: PeerReviewed identifier: Zlatic, Vinko and Bianconi, Ginestra and Díaz-Guilera, Albert and Garlaschelli, Diego and Rao, Francesco and Caldarelli, Guido On the rich-club effect in dense and weighted networks. The European Physical Journal B, 67 (3). pp. 271-275. ISSN 1434-6028 (2009) relation: http://dx.doi.org/10.1140/epjb/e2009-00007-9 relation: 10.1140/epjb/e2009-00007-9