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Homophily and Triadic Closure in Evolving Social Networks

Irene Crimaldi (), Michela Del Vicario (), Greg Morrison (), Walter Quattrociocchi () and Massimo Riccaboni ()
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Irene Crimaldi: IMT School for Advanced Studies Lucca
Michela Del Vicario: IMT School for Advanced Studies Lucca
Greg Morrison: IMT School for Advanced Studies Lucca
Walter Quattrociocchi: IMT School for Advanced Studies Lucca

No 3/2015, Working Papers from IMT School for Advanced Studies Lucca

Abstract: We present a new network model accounting for homophily and triadic closure in the evolution of social networks. In particular, in our model, each node is characterized by a number of features and the probability of a link between two nodes depends on common features. The bipartite network of the actors and features evolves according to a dynamics that depends on three parame-ters that respectively regulate the preferential attachment in the transmission of the features to the nodes, the number of new features per node, and the power-law behavior of the total number of observed features. We provide theoretical results and statistical estimators for the parameters of the model. We validate our approach by means of simulations and an empirical analysis of a network of scientifc collaborations.

Keywords: social network; bipartite network; preferential attachment; homophily triadic closure; transitivity (search for similar items in EconPapers)
JEL-codes: C13 C18 O35 Z13 (search for similar items in EconPapers)
Pages: 35 pages
Date: 2015-05, Revised 2015-05
New Economics Papers: this item is included in nep-evo, nep-net and nep-soc
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Published in EIC working paper series

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