title: Scale-free networks from varying vertex intrinsic fitness.
abstract: A new mechanism leading to scale-free networks is proposed in this Letter. It is shown that, in many cases of interest, the connectivity power-law behavior is neither related to dynamical properties nor to preferential attachment. Assigning a quenched fitness value x(i) to every vertex, and drawing links among vertices with a probability depending on the fitnesses of the two involved sites, gives rise to what we call a good-get-richer mechanism, in which sites with larger fitness are more likely to become hubs (i.e., to be highly connected).
authors.affiliation: INFM UdR ROMA1 Dipartimento Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Caldarelli
authors.forename: A
authors.initials: A
authors.lastname: Capocci
authors.forename: P
authors.initials: P
authors.lastname: De Los Rios
authors.forename: M A
authors.initials: MA
authors.lastname: Muñoz
mesh_terms: D000465:Algorithms; D020407:Internet; D008962:Models, Theoretical; D011506:Proteins; D012944:Social Support
chemical_list: D011506:Proteins