Type
Article
Titre
Activeness as a key to counter democratic balance
Dans
Physica A: Statistical Mechanics and its Applications
Auteur(s)
QIAN Shen - Institute of Policy and Management, Chinese Academy of Science, (Auteur)
LIU Yijun - Institute of Policy and Management, Chinese Academy of Science (Auteur)
GALAM Serge - Centre de recherches politiques de Sciences Po (Auteur)
Éditeur
NL : North-Holland Publishing Company
Volume
432
Pages
187 - 196 p.
ISSN
03784371
Mots clés
sociophysics, opinion dynamics, minority spreading
Résumé
EN
According to the classic Galam model of opinion dynamics, each agent participates at each update of an opinion interaction. While the scheme gives everyone the same chance to in- fluence others, in reality, social activity and influence vary considerably from one agent to another. To account for such a feature, we introduce a new individual attribute – ‘‘active- ness’’ – which makes some agents more inclined than others at engaging in local discus- sions. To enhance the corresponding effect, opinion updates are shifted from all-out agent interaction cycles to few agent interaction cycles. Using dynamic analysis and simulations the resulting model is found to exhibit a ‘‘Minority Counteroffensive’’ phenomenon, which under some initial conditions makes the minority to win the opinion competition despite a threshold tipping point at fifty percent. The associated probabilistic phenomenon persists in the case ‘‘activeness’’ is held equal for all agents. The effect of ‘‘opinion leaders’’ is also investigated. Indeed, a leader is an inflexible agent, i.e., an agent who does not change opin- ion. The results reveal that two opinion leaders with moderate social influence may have a stronger effect than one opinion leader with a strong social influence. The model may shed a new light to the understanding of opinion formation and public voting.

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