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• W4290844306 endingPage "103773" @default.
• W4290844306 startingPage "103773" @default.
• W4290844306 abstract "When individuals interact in a social network their opinions can change, at times quite significantly, as a result of social influence. In elections, for example, while they might initially support one candidate, what their friends say may lead them to support another. But how do opinions settle in a social network, as a result of social influence? A recently proposed graph-theoretic metric, the influence gap, has shown to be a reliable predictor of the effect of social influence in two-party elections, albeit only tested on regular and scale-free graphs. Here, we investigate whether the influence gap is able to predict the outcome of multi-party elections on networks exhibiting community structure, i.e., made of highly interconnected components, and therefore more resembling of real-world interaction. To encode communities we build on the classical model of caveman graphs, which we extend to a richer graph family that displays different levels of homophily, i.e., how many connections and opinions are intertwined. Our contribution is three-fold. First, we study the predictive power of the influence gap in the presence of communities. We show that when there is no clear initial majority the influence gap is not a good predictor of the election outcome. When we instead allow for varying majorities, although the influence gap improves as a predictor, counting the initial partisan majority does consistently better, across all levels of homophily. Second, we study the combined effect of the more predictive metrics, as function of the homophily levels. Using regression models, we demonstrate that the influence gap combined with the initial votes count does increase the overall predictive power for some levels of homophily. Third, we study elections with more than two parties. Specifically, we extend the definition of the influence gap to any number of parties, considering various generalisations, and show that the initial votes count has an even higher predictive power when compared to influence gap than it did in the two-party case." @default.
• W4290844306 created "2022-08-12" @default.
• W4290844306 creator A5016997032 @default.
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• W4290844306 date "2022-11-01" @default.
• W4290844306 modified "2023-10-05" @default.
• W4290844306 title "Predicting voting outcomes in the presence of communities, echo chambers and multiple parties" @default.
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• W4290844306 doi "https://doi.org/10.1016/j.artint.2022.103773" @default.
• W4290844306 hasPublicationYear "2022" @default.
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