eprintid: 2841
rev_number: 8
eprint_status: archive
userid: 69
dir: disk0/00/00/28/41
datestamp: 2015-11-06 11:04:00
lastmod: 2015-11-06 11:04:00
status_changed: 2015-11-06 11:04:00
type: article
metadata_visibility: show
creators_name: Zhou, Tao
creators_name: Medo, Matúš
creators_name: Cimini, Giulio
creators_name: Zhang, Zi-Ke
creators_name: Zhang, Yi-Cheng
creators_id: 
creators_id: 
creators_id: giulio.cimini@imtlucca.it
creators_id: 
creators_id: 
title: Emergence of Scale-Free Leadership Structure in Social Recommender Systems
ispublished: pub
subjects: HA
subjects: QA
divisions: EIC
full_text_status: public
keywords: Social networks, Network analysis, Statistical distributions, Scale-free networks
abstract: <p>The study of the organization of social networks is important for the understanding of opinion formation, rumor spreading, and the emergence of trends and fashion. This paper reports empirical analysis of networks extracted from four leading sites with social functionality (Delicious, Flickr, Twitter and YouTube) and shows that they all display a scale-free leadership structure. To reproduce this feature, we propose an adaptive network model driven by social recommending. Artificial agent-based simulations of this model highlight a “good get richer” mechanism where users with broad interests and good judgments are likely to become popular leaders for the others. Simulations also indicate that the studied social recommendation mechanism can gradually improve the user experience by adapting to tastes of its users. Finally we outline implications for real online resource-sharing systems.</p>
date: 2011
date_type: published
publication: PloS One
volume: 6
number: 7
publisher: Public Library of Science
pagerange: e20648
id_number: 10.1371%2Fjournal.pone.0020648
refereed: TRUE
issn: 1932-6203
official_url: http://dx.doi.org/10.1371%2Fjournal.pone.0020648
citation:   Zhou, Tao and Medo, Matúš and Cimini, Giulio and Zhang, Zi-Ke and Zhang, Yi-Cheng  Emergence of Scale-Free Leadership Structure in Social Recommender Systems.  PloS One, 6 (7).  e20648.  ISSN 1932-6203      (2011)  
document_url: http://eprints.imtlucca.it/2841/1/journal.pone.0020648.pdf