BEGIN:VCALENDAR VERSION:2.0 PRODID:-//AMSE//Event Calendar//FR CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT UID:event-9251@www.amse-aixmarseille.fr DTSTAMP:20260428T060715Z CREATED:20260428T060715Z LAST-MODIFIED:20260428T060715Z STATUS:CONFIRMED SEQUENCE:0 SUMMARY:Economic theory seminar - Shaden Shabayek DTSTART:20220623T100000Z DTEND:20220623T110000Z DESCRIPTION:Are all people equal on social media or do popular voices domin ate the conversation? This paper widens the scope of analysis of opinion dy namic models by introducing a novel heuristic: individuals express their op inion or hide it\, as a function of their popularity. Intuitively\, individ uals who hide their opinion could be interpreted as individuals who have a low popularity such that even if they speak-up (or tweet) they will not be heard. Popular individuals express their opinion and can interact with like -minded or ideologically-opposed peers\, namely expression entails debates and discussions. In the presence of hidden opinions\, I show that the inter actions between popular individuals and the magnitude of their influence ex plains whether consensus or polarization prevails. The primary mechanism at play is that the influence structure allows for consensus of opinion local ly but communication between ideologically opposed expressers lead to globa l disagreement. The main contribution of this paper is to provide a unifyin g theoretical framework to assess different long-run opinion patterns with a focus on the topology of the network. I provide a measure of polarization and I run simulations to show the extent to which the topology of the netw ork affects long-run opinion patterns.\\n\\nContact: Gaëtan Fournier : gae tan.fournier[at]univ-amu.frEvgeny Tsodikovich : evgeny.tsodikovich[at]univ -amu.fr\n\nPlus d'informations: https://www.amse-aixmarseille.fr/fr/eveneme nts/shaden-shabayek LOCATION:Îlot Bernard du Bois - Salle 16\, AMU - AMSE\, 5-9 boulevard Maur ice Bourdet\, 13001 Marseille URL;VALUE=URI:https://www.amse-aixmarseille.fr/fr/evenements/shaden-shabayek CONTACT:Gaëtan Fournier : gaetan.fournier[at]univ-amu.frEvgeny Tsodikovich  \;: evgeny.tsodikovich[at]univ-amu.fr TRANSP:OPAQUE END:VEVENT END:VCALENDAR