Alexandros Gelastopoulos
@alexgelas.bsky.social
Research fellow at the Institute for Advanced Study in Toulouse. Mathematics in the social sciences. alexgelas.com
How does social influence shape collective outcomes? When does it lead to lock-in on inferior options? In our 🚨 new preprint 📝 osf.io/preprints/so... we make three contributions w/ @alexgelas.bsky.social Alex Jochim @leostnbrk.bsky.social Peter Steiglechner & @pantelispa.bsky.social 🧵1/4
OSF
doi.org
1/ Why do inferior but popular things remain popular? Excited to share our new paper with @pantelispa.bsky.social, @glemens.bsky.social & @arnoutvanderijt.bsky.social "The marginal majority effect: When social influence produces lock-in" www.science.org/doi/epdf/10....
The marginal majority effect: When social influence produces lock-in
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science.org
Four travel grants available for PhD students and postdocs to present their posters at the 13th Toulouse Economics and Biology Workshop! Apply by Feb 27th. www.iast.fr/conferences/...
13th Toulouse Economics and Biology Workshop
13th Toulouse Economics and Biology Workshop, Toulouse, TSE/IAST Building, June 1–2, 2026.
iast.fr
I am hiring a postdoc for a DFF-funded project on social influence, and the decision processes that fuel rich-get-richer dynamics in the online/offline world. The position is for up to a year, competitive Danish salary, remote work possible. Interested or know somebody? DM me or share!
It is the time of the year when I tell you about my favorite post-doc ever 👇 Unless you are allergic to the French, this one sits up there with the Nuffield postdoc (life style, productivity, interdisciplinary stimulation). Share widely! Apply! #poliscky www.iast.fr/research-fel...
Research Fellowships
Each year, IAST invites applications for post-doctoral Research Fellowships, which offer candidates an opportunity to devote themselves full-time to their research at the start of their careers. Fello...
iast.fr
📣 We are excited (or should we say disgusted?) to announce the conference 'Disgust across borders' at IAST! @iast.fr 🗓️ Join us on Dec 4 & 5 for two days full of disgust research across species and disciplines. Registration and abstract submission are open (until Aug 31): forms.gle/QBmkUB3aLDjY...
As some of you guessed, the two models are statistically indistinguishable. The answer is Model 1, but there was no way to tell from the data. I was very surprised when I first saw this. Here we show that this confounding of heterogeneity and reinforcement is general: www.pnas.org/doi/10.1073/...
Reinforcement generates systematic differences without heterogeneity | PNAS
Inequality in outcomes may emerge through a reinforcement process in which stochastic variation in values is determined by prior values but may als...
pnas.org
Arnout van de Rijt@arnoutvanderijt.bsky.social · last yr.Did Model 1 or Model 2 generate these sequences? Why? Model 1: Pólya urn, starting with one black and one red ball. 1 (0) stands for black (red). Model 2: Empty probit model, random intercepts with mean 0, ICC = 1/2. All 100,000 sequences here: tinyurl.com/35pkyfxa
We are hiring postdocs in Computational Social Science 📍SweCSS, Norrköping, Sweden ⏰Deadline June 3 🔗https://liu.se/en/work-at-liu/vacancies/26854 Please apply // help us spread the word
Did Model 1 or Model 2 generate these sequences? Why? Model 1: Pólya urn, starting with one black and one red ball. 1 (0) stands for black (red). Model 2: Empty probit model, random intercepts with mean 0, ICC = 1/2. All 100,000 sequences here: tinyurl.com/35pkyfxa
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