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The formation of political discussion networks
Marian-Gabriel Hâncean, Matjaž Perc, Adrian Gheorghiță, George G. Vega Yon, Bianca-Elena Mihǎilǎ, 2022, izvirni znanstveni članek

Opis: Dialogues among politicians provide a window into political landscapes and relations among parties and nations. Existing research has focused on the outcomes of such dialogues and on the structure of social networks on which they take place. Little is known, however, about how political discussion networks form and which are the main driving forces behind their formation. We study a collection of ego-networks from 30 randomly sampled Romanian politicians to reveal fundamental processes behind the formation of political discussion networks. We show that ties in such networks tend to be strong and balanced, and that their organization is not affected by sex, age or education homophily. We use the exponential family of random graph models for small networks to assess likely closure mechanisms and possible homophily effects, but we note that further research and additional data are needed to fully understand the impact of context and political affiliations on the generalization of our findings.
Ključne besede: political discussion, homophily, exponential random graphs, social physics
Objavljeno v DKUM: 20.09.2024; Ogledov: 0; Prenosov: 1
Celotno besedilo (1,27 MB)
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Homophily in coauthorship networks of East European sociologists
Marian-Gabriel Hâncean, Matjaž Perc, 2016, izvirni znanstveni članek

Opis: We study to what degree and how homophily and network properties affect individual citation counts of researchers in the sociology departments of three East European countries, namely Poland, Romania, and Slovenia. We built first-order personal coauthorship networks out of the Web of Science publication records. Each sociologist is assigned as a focal node or ego, while her coauthors are alters. We analyze the data using structural measurements methods, hierarchical regression models, and we make visualizations based on the clustered graph technique. For all three populations, our results indicate that the mean score of the citations of alters substantially predicts the citation counts of egos. In particular, citation similarity increases the chances for coauthorship ties. Evidence for the impact of network properties on the citation levels of egos is mixed. For Poland, normalized ego-betweenness shows a negative effect on citation counts, while network density displays a positive one. For Romania and Slovenia, network characteristics have only a minor impact. Even if the visual summarization of the personal networks uncovers a wide palette of coauthorship patterns, homophily appears to be pervasive. These results are relevant for domestic policy makers who aim to improve the aggregated research performance in East European countries.
Ključne besede: social network, sociology, homophily, physics of social systems
Objavljeno v DKUM: 23.06.2017; Ogledov: 1002; Prenosov: 426
Celotno besedilo (1,21 MB)
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