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Author Bottcher, L.; Montealegre, P.; Goles, E.; Gersbach, H. doi  openurl
  Title Competing activists-Political polarization Type Journal Article
  Year 2020 Publication Physica A-Statistical Mechanics And Its Applications Abbreviated Journal Physica A  
  Volume 545 Issue Pages 13 pp  
  Keywords Political polarization; Opinion formation; Activists; Markov chains; Game theory  
  Abstract Recent empirical findings suggest that societies have become more polarized in various countries. That is, the median voter of today represents a smaller fraction of society compared to two decades ago and yet, the mechanisms underlying this phenomenon are not fully understood. Since interactions between influential actors ("activists'') and voters play a major role in opinion formation, e.g. through social media, we develop a macroscopic opinion model in which competing activists spread their political ideas in specific groups of society. These ideas spread further to other groups in declining strength. While unilateral spreading shifts the opinion distribution, competition of activists leads to additional phenomena: Small heterogeneities among competing activists cause them to target different groups in society, which amplifies polarization. For moderate heterogeneities, we obtain target cycles and further amplification of polarization. In such cycles, the stronger activist differentiates himself from the weaker one, while the latter aims to imitate the stronger activist. (C) 2019 Elsevier B.V. All rights reserved.  
  Address [Boettcher, Lucas] Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland, Email: lucasb@ethz.ch  
  Corporate Author Thesis  
  Publisher Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0378-4371 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000526845600034 Approved (up) no  
  Call Number UAI @ eduardo.moreno @ Serial 1147  
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