We are excited to welcome @rafaelprietocuriel.bsky.social as a 2026 keynote for IC2S2. His work at the Complexity Science Hub in Vienna, as well as his work with OECD - OCDE and the The World Bank focuses on mobility, migration and urban dynamics:

2026 abstract submissions are open! ✔️ Submission deadline: March 3rd, 2026 ✔️ Acceptance Notification: April 14th, 2026 View the guidelines here: lnkd.in/eJEXvd8u

2026 tutorial submissions are open! ✔️ Submission deadline: February 2nd, 2026 ✔️Acceptance Notification: February 16th, 2026 View the guidelines here: lnkd.in/eBHVe2tP

Keynote Announcement! We're thrilled to have Kate Starbird from the University of Washington's Department of Human Centered Design & Engineering speak at IC2S2 2026. Registration is open with submissions opening on 12/15: ic2s2-2026.org

IC2S2 2026 registration is open! Explore the 2026 conference here ➡️ ic2s2-2026.org ✔️ Submissions open December 15th ✔️ Keynotes will be announced between now and February ✔️ Full program of selected talks and tutorials will be available in late April

We're excited to announce that the website and registration for IC2S2 2026 (July 28-31) will launch in early December! The Vermont Complex Systems Institute @vcsi.bsky.social at the University of Vermont will be hosting IC2S2 in 2026: youtube.com/watch?v=p412S4GnPkc&feature=youtu.be

All the keynote recordings are available now, enjoy! www.youtube.com/playlist?lis...

For those who are going to spend another night in Norrköping, please join us there👇

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!

Sarah Williams capped our keynote series with a powerful call: make data a force for empowerment and public good. What insight resonated most with you? #ic2s2

Last chance to catch our parallel sessions! Today’s lineup spans polarization, media and online discourse, governance policy, and more. Pick your track, join the discussion, and make the most of this final day. #ic2s2

The final poster session is now. Drop by, exchange ideas, and join the lively discussion! #ic2s2

You can still vote for your favorite poster today. Use the opportunity during the lunch break or the scheduled poster session. The poll will close early today, at 2:30pm! Make your voice heard! #ic2s2

The final day’s lightning round offered another eight sharp takes on media bias, science of science, etc. Which talk stood out to you? #ic2s2

Please vote for the best poster #ic2s2

Prediction and explanation, together. Duncan Watts opened our final day with a keynote on “Integrating explanation and prediction in computational social science,” showing how pairing causal insight with predictive testing can push computational social science forward. #ic2s2

Want to keep the conversations flowing at #ic2s2? A crowd is heading to a focal bar: Arbis Kafé & Salonger (outside), a short walk from the conference venue. maps.app.goo.gl/ekmuCNQeWy4e...

Arnout van de Rijt gave Day 2 a strong ending with his keynote, “Luck and success in millions of life courses.” Do early strokes of luck widen life-course income gaps? This keynote offered fresh causal evidence on chance and inequality. #ic2s2

Day 2 Keynotes. How can computational methods sharpen our grasp of culture? In Amir Goldberg’s inspiring keynote, he showed how computational methods reveal hidden cultural patterns. #ic2s2

More than 100 posters are on display in the Atrium. Explore your favorite topics, chat with the authors, and cast your vote. #ic2s2

Day 2 and the momentum at #ic2s2 ’25 keeps building. Parallel sessions are running across multiple tracks: network science, social media, economics, science of science, and more.

Eight lightning talks just delivered rapid-fire insights on human–LLM interactions, mobility, and inequality. Which one impressed you most? Share your thoughts! #ic2s2

Day 2 Keynotes kicked off with Laura Nelson's inspiring presentation, “Why Qualitative Research Needs Computational Social Science”. What is the state of this maturing field called qualitative computational methods? What are the ongoing debates and futures? #ic2s2

Hope your first day of #ic2s2 ‘25 was fruitful. Reminder: afternoon keynotes begin at 4:30 pm sharp, please arrive promptly so you don’t miss a moment. See you tomorrow!

Dinner at 19:00 for those who have yellow tickets: head to Värmekyrkan, Holmengatan 3, 602 32 Norrköping—just a five-minute walk from the conference venue. See you there soon! #ic2s2

Day 1 keynote - Continuing the LLM conversation, Lisa P. Argyle presented “Arti-fickle’ Intelligence: Using LLMs as a Tool for Inference in the Political and Social Sciences.” Which guidelines do you resonate with the most to establish the failure and success of LLMs? #ic2s2

Day 1 Keynote “Design-Based Supervised Learning (DSL): A General Framework for Using LLM Annotations and Other Predicted Variables in Downstream Analyses” by Brandon Stewart. Try DSL in your research? Available at dsl.software #ic2s2

Parallel sessions are underway, with multiple tracks covering network dynamics, LLMs, mobility and urban science, political narratives, and more. Scan the program, join the talks that excite you, and share your insights with the community #ic2s2.

Poster Session 1 is live in the Atrium! Explore the work and cast your daily vote—just scan the QR code to submit your favorite poster ID. Everyone has one vote per day. #ic2s2

Need some local guide to navigate the city? 👇

Day 1 Keynote “Computational analysis of social and organizational systems” by Kathleen M. Carley. Who is influencing whom online, how, and to what effect? This keynote showed how BEND framework is operationalized by combining network science and AI. #ic2s2

Day 1 Keynote by Dean Eckles: Effect sizes and decisions. How are your effect-size metrics actually decision-relevant, or just convenient to compute? #ic2s2

With record-breaking submissions and our most competitive, gender-balanced program on record, #IC2S2’25 has officially started! Please check the updated program and plan your day. #ic2s2

We had amazing tutorial sessions today! Enjoy the rest of the conference and your stay in Norrköping. Opening remarks start tomorrow at 08:45 at De Geerhallen. The online program has been updated. Check the latest schedule to make sure you don’t miss out. See you tomorrow! #ic2s2

The deep dive continues this afternoon. Join the tutorials before it is too late. Check out the packed rooms, live coding, and inspiring discussions. #ic2s2

Excited to co-organize the Bridging Human and LLM Annotations for Social Science tutorial at #ic2s2 tomorrow! Join us at 1:30pm CEST to learn how to combine Qualtrics+Prolific, MTurk, & LLMs for automated annotation and valid estimates. Code&materials: github.com/kristinaglig...

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!)

Morning tutorials are in full swing. Share with us which insights you’re taking away. #ic2s2

Also at @ic2s2.bsky.social this week? Eager to connect with the 🦋 community? Check out this custom feed tracking IC2S2 mentions: bsky.app/profile/did:...

Tutorial Day kicks off tomorrow! Which sessions are you going to attend? 📚 Check the lineup and share your picks. #ic2s2 #tutorials

Program? Check! Registration? Check! Beautiful merch? Check! Getting some real conference vibes over here in Norrköping. We’ve spent the day getting ready for Monday — I‘m really excited to see you all over here for @ic2s2.bsky.social!

#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! 🇸🇪

Poster schedule just dropped—#IC2S2’25 program is now complete! Dive in and start planning: www.ic2s2-2025.org/program/

🚀 Draft schedule for #IC2S2 2025 (July 21–24) is here. Explore four days packed with inspiration. Review your slot, plan travel, and flag any conflicts—minor tweaks are still possible. See the program here: www.ic2s2-2025.org/program/. The poster scheduling will follow next week!

Early‑bird rate ends today—register now and save.

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

Decisions are out! 🎉 #IC2S2’25 will feature 16 lightning talks, 290 parallel talks, and more than 360 posters. Check your inbox for your decision email—we can’t wait to see you in Norrköping this July.

Dean Eckles, the William F. Pounds Associate Professor of Management and an Associate Professor of Marketing at MIT Sloan, will be a keynote speaker for #IC2S2 2025 in Norrköping, Sweden. 🎙Effect sizes and decisions. Learn more: ic2s2-2025.org/keynotes/

Sarah Williams, Associate Professor of Technology and Urban Planning at MIT, will be a keynote speaker for #IC2S2 2025 in Norrköping, Sweden. 🎙Urban policy and big data for public good. Learn more: www.ic2s2-2025.org/keynotes/

Brandon Stewart, Associate Professor of Sociology at Princeton University, will be a keynote speaker for #IC2S2 2025 in Norrköping, Sweden. 🎙Design-Based Supervised Learning: A General Framework for Using LLM Annotations and Other Predicted Variables in Downstream Analyses.