Martin Arvidsson

Why did I visit the Facebook pages of 5500 German grocery stores on a grey lockdown day ca. 2021?

You can now find out in AJS.

Our work on ethnoreligious infrastructures is finally online in the ominous Volume 0:

www.journals.uchicago.edu/doi/10.1086/...

📢 The deadline to submit workshop and session proposals to EUSN 2026 has been extended till 9 December!

ℹ️ For more information, see:
liu.se/en/event/eus...

📝 Please send your submissions to:
eusn2026@liu.se

The 8th European Conference on Social Networks (EUSN 2026) The 8th European Conference on Social Networks (EUSN 2026) will take place on 11–15 August 2026 in Norrköping, Sweden, hosted by the Institute for Analytical Sociology (IAS), Linköping University. The conference brings together scholars and ...

The 8th European Conference on Social Networks (EUSN 2026) will take place on 11-15 August 2026 in Norrköping, Sweden, hosted by @iasliu.bsky.social

⌛ Deadline for workshop and session proposals: 1 December 2025

More information: liu.se/en/event/eus...

Job! A vacancy at the @eui-eu.bsky.social for a postdoc joining the @learnineq.bsky.social project, for 13 months, starting mid January. We study inequalities in school careers, and we engage with policy makers. The vacancy is here, please forward. DEADLINE 24 NOVEMBER. www.eui.eu/Documents/Se...

🇫🇷 We are hiring 🇫🇷

Assistant or Associate Professor Position in Computational Sociology @crestsociology.bsky.social @ipparis.bsky.social

Details here (please RT)
www.shorturl.at/E57le

Wide Social Influence and the Emergence of the Unexpected: An Empirical Test Using Spotify Data Article: Wide Social Influence and the Emergence of the Unexpected: An Empirical Test Using Spotify Data | Sociological Science | Posted October 23, 2025

6/6 Here's a link to the paper: sociologicalscience.com/articles-v12...

5/ Examining the macro-dynamics, we used agent-based simulations integrating prior models of homophily and decoupling, showing that network composition matters: a sufficient presence of partial-overlap ties is crucial for widespread diffusion of novelty and the emergence of the unexpected.

4/ We find support for the hypothesized homophily trade-off: (a) stronger taste overlap → stronger peer influence, but also (b) stronger overlap → less exposure to novel content.

3/ To test this, we analyzed 1M Spotify users. Treating playlists as documents and artists as words, we used topic modeling to infer musical tastes, peer overlap, and exposure novelty. To distinguish selection & influence, we compared un/treated users with similar musical tastes—the key confounder.

2/ At the core is a hypothesized homophily trade-off: too much taste similarity→influence but no exposure to novelty; too little similarity→exposure to novelty but weak influence. Partial overlap strikes the balance, both exposing and influencing individuals toward content outside their repertoire.

Wide Social Influence and the Emergence of the Unexpected: An Empirical Test Using Spotify Data Article: Wide Social Influence and the Emergence of the Unexpected: An Empirical Test Using Spotify Data | Sociological Science | Posted October 23, 2025

🧵1/6
New paper out in @sociologicalsci.bsky.social with @marckeuschnigg.bsky.social and Peter Hedström! We identify a social-influence mechanism that widens individuals' behavioral repertoires and breaks the link between individuals' initial preferences and the collective outcomes they bring about.

🔈Job Alert!
Swedish Excellence Center in Computational Social Science (SWECSS) is hiring postdoctoral researchers. Positions are available at IAS and the Department of Computer Science (IDA).

⌛Deadline: 31 October
IAS: liu.se/en/work-at-l...
IDA: liu.se/en/work-at-l...

#academicsky #css

The Swedish Excellence Centre for Computational Social Science This is a research hub and training centre at the forefront of Computational Social Science, a rapidly growing field that leverages computational tools to advance our understanding of human behavior a...

📢 Join the SweCSS Community!

If you would like to stay informed about upcoming events, job opportunities, and news from The Swedish Excellence Centre for Computational Social Science (SweCSS), you are welcome to join our mailing list. #css #academicsky

👉 Sign up here: liu.se/en/research/...

How does behavior spread? New insights on complex contagion in social networks with causal evidence from a country-scale field experiment @davidlazer.bsky.social sociologicalscience.com/articles-v12...

Call for two or more open-rank academic positions in Sociology

We're hiring in wonderful Copenhagen 🇩🇰

Two or more open rank sociology professorships (tt assistant, associate with tenure, or full prof with tenure).

You'll join a leading sociology department in Europe with many core fields represented!

#sociology

More 👇

jobportal.ku.dk/videnskabeli...

The Stanford GSB is hiring in macro & micro OB! If you do sociology, psychology, OB, strategy, management, computational social science, please apply.

On the macro side, mid-career folks are especially invited to apply.

See here👇
www.gsb.stanford.edu/jobs/faculty...

That’s a wrap on IC2S2’25! 🎉 Thank you for an unforgettable week of ideas and discussions. Congratulations to our award winners, and safe travels home. Mark your calendars: #ic2s2 ’ 26 heads to Burlington, Vermont, in the US. See you next year!

Attending #IC2S2 or following along from home? Here's a feed of all the posts using the relevant hashtags or mentioning the conference account!

(I'm feeling very strong FOMO and am relying on all of you there in person to post as much as possible!)

Nice new paper in PNAS providing further evidence that random/long ties help social contagions — even many that would be labeled "complex contagions"
www.pnas.org/doi/10.1073/... @davidlazer.bsky.social

This is a fairly technical but highly relevant paper on how we can model complex systems at various levels of detail without losing causal content. Think gas: instead of tracking every molecule, we can focus on big-picture properties like temperature and pressure. www.auai.org/uai2017/proc...

#IC2S2 2025 is just around the corner! July 21–24 in Norrköping, Sweden. Bookmark tutorials, keynotes, and must-see sessions and connect with fellow attendees using #IC2S2.
Full program here: www.ic2s2-2025.org/program/
See you in Norrköping! 🇸🇪

Networks, Migration, Climate, and lots of exciting Statistical Models: Come work with on a potpourri of these topics as a POSTDOC in a joint project between TOULOUSE and ZURICH: it'll be even more exciting than it sounds: tinyurl.com/climatenetmig

The deadline for submissions to the special issue honoring Richard Breen has been postponed to August 31st

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/...

🧵1/8
In our new #OA article, we studied the drivers of ethnic school segregation.
Research on segregation often points to parental preferences, but what if it's not just about what parents want, but also what options they actually have?

🔗 doi.org/10.1093/esr/jcaf027

Norrköping campus at sunset

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

⏰ Early‑bird registration for #IC2S2’25 in Norrköping ends May 9—lock in your spot (and the discount) today: www.ic2s2-2025.org/register/