Marginal models with individual-specific effects for the analysis of longitudinal bipartite networks

Francesco Bartolucci (), Antonietta Mira () and Stefano Peluso ()
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Francesco Bartolucci: University of Perugia, Department of Economics
Antonietta Mira: Università della Svizzera Italiana, Euler Institute
Stefano Peluso: Università della Svizzera Italiana, Euler Institute

Advances in Data Analysis and Classification, 2025, vol. 19, issue 4, No 3, 895-920

Abstract: Abstract A new modeling framework for bipartite social networks arising from a sequence of partially time-ordered relational events is proposed. We directly model the joint distribution of the binary variables indicating if each single actor is involved or not in an event. The adopted parametrization is based on first- and second-order effects, formulated as in marginal models for categorical data and free higher order effects. In particular, second-order effects are log-odds ratios with meaningful interpretation from the social perspective in terms of tendency to cooperate, in contrast to first-order effects interpreted in terms of tendency of each single actor to participate in an event. These effects are parametrized on the basis of the event times, so that suitable latent trajectories of individual behaviors may be represented. Inference is based on a composite likelihood function, maximized by an algorithm with numerical complexity proportional to the square of the number of units in the network. A classification composite likelihood is used to cluster the actors, simplifying the interpretation of the data structure. The proposed approach is illustrated on simulated data and on a dataset of scientific articles published in four top statistical journals from 2003 to 2012.

Keywords: Association; Binary variables; Cluster analysis; Composite likelihood; Latent trajectories; Log-odds ratios; 91D30; 62H12; 62P25 (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s11634-024-00604-7

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