relation: http://eprints.imtlucca.it/2839/ title: Heterogeneity, quality, and reputation in an adaptive recommendation model creator: Cimini, Giulio creator: Medo, Matúš creator: Zhou, Tao creator: Wei, Dong creator: Zhang, Yi-Cheng subject: H Social Sciences (General) subject: QC Physics description: Recommender systems help people cope with the problem of information overload. A recently proposed adaptive news recommender model [M. Medo, Y.-C. Zhang, T. Zhou, Europhys. Lett. 88, 38005 (2009)] is based on epidemic-like spreading of news in a social network. By means of agent-based simulations we study a “good get richer” feature of the model and determine which attributes are necessary for a user to play a leading role in the network. We further investigate the filtering efficiency of the model as well as its robustness against malicious and spamming behaviour. We show that incorporating user reputation in the recommendation process can substantially improve the outcome. publisher: Springer date: 2011 type: Article type: PeerReviewed format: application/pdf language: en rights: cc_by_nc identifier: http://eprints.imtlucca.it/2839/1/1012.1099v1.pdf identifier: Cimini, Giulio and Medo, Matúš and Zhou, Tao and Wei, Dong and Zhang, Yi-Cheng Heterogeneity, quality, and reputation in an adaptive recommendation model. The European Physical Journal B - Condensed Matter, 80 (2). pp. 201-208. ISSN 1434-6028 (2011) relation: http://dx.doi.org/ relation: 10.1140/epjb/e2010-10716-5