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Homophily and Triadic Closure in Evolving Social Networks

Crimaldi, Irene and Del Vicario, Michela and Morrison, Greg and Quattrociocchi, Walter and Riccaboni, Massimo Homophily and Triadic Closure in Evolving Social Networks. EIC working paper series #3/2015 IMT Institute for Advanced Studies Lucca

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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 parameters 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.

Item Type: Working Paper (EIC working paper series)
Uncontrolled Keywords: JEL codes: C13, C18, O35, Z13 - Keywords: social network, bipartite network, preferential attachment, homophily, triadic closure, transitivity.
Subjects: H Social Sciences > H Social Sciences (General)
Research Area: Economics and Institutional Change
Depositing User: Caterina Tangheroni
Date Deposited: 05 May 2015 12:20
Last Modified: 06 May 2015 08:56
URI: http://eprints.imtlucca.it/id/eprint/2667

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