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Homophily and Triadic Closure in Evolving Social Networks

Author

Listed:
  • 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)

  • Massimo Riccaboni

    (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.

Suggested Citation

  • Irene Crimaldi & Michela Del Vicario & Greg Morrison & Walter Quattrociocchi & Massimo Riccaboni, 2015. "Homophily and Triadic Closure in Evolving Social Networks," Working Papers 3/2015, IMT School for Advanced Studies Lucca, revised May 2015.
    • Handle: RePEc:ial:wpaper:3/2015
    as

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    File URL: http://eprints.imtlucca.it/2667/1/WP_3_2015.pdf
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    social network; bipartite network; preferential attachment; homophily triadic closure; transitivity;
    All these keywords.

    JEL classification:

    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
    • C18 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Methodolical Issues: General
    • O35 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Social Innovation
    • Z13 - Other Special Topics - - Cultural Economics - - - Economic Sociology; Economic Anthropology; Language; Social and Economic Stratification

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