Sune Lehmann

Hiring a full-time RA in Copenhagen: LLM-assisted empirical research on Danish registry data. www.linkedin.com/posts/andbjn... Join the great team with: @davidwestergaard.bsky.social @dashunwang.bsky.social @sunelehmann.com

Attention arXiv authors. Because of the exponential increase in submissions, arXiv is limiting the number of papers that a person can submit each month to two. blog.arxiv.org/2025/10/31/a...

Applications are open for SFI's 2027 Complexity Postdoctoral Fellowships. SFI is looking for recent Ph.D. graduates with strong quantitative and computational skills who want to pursue independent, transdisciplinary research. Deadline: September 30, 2026 Apply: santafe.edu/sfifellowship

Good news everyone! 🎉 The new version 3.0 of graph-tool is just out with major improvements! See below. graph-tool.skewed.de graph-tool is a comprehensive and efficient Python library to work with networks, including structural, dynamical, and statistical algorithms, as well as visualization. 1/N

@icelabumu.bsky.social in Umeå is hiring a tenure-track Assistant Professor in Computing Science (ML focus). Start your own group in a genuinely interdisciplinary lab. Awesome science, fantastic people. Deadline Aug 10, 2026. www.umu.se/en/work-with...

New on the blog: A short post on reading in the age of AI. My rule: zero AI fiction. But I'm open to using LLMs to learn (yet uneasy that every prompt is a vote against Wikipedia and the open knowledge commons ... and many other issues). sunelehmann.com/blog/reading...

ArXiV has a new LLM policy (Screenshots with alt text so you don’t have to click through to the other place and see all the stupid responses)

Thrilled to announce CS2Nordics: the First Nordic Conference on Computational Social Science. Copenhagen, September 21-22, 2026. We invite all CSS researchers in the Nordics as well as in the international research community to submit 2-page abstracts by June 19: nosocss.org/conference.h....

Fantastic opportunity to study tipping points and social contagion 👇 using large scale data

Women's mobility networks enable more efficient travel. Great work by Silvia de Sojo, @sunelehmann.com and Laura Alessandretti. arxiv.org/abs/2604.00943

I wrote briefly about how to do peer review for students: yyahn.com/wiki/Peer%20... Also includes some other advices from others including @jessicacalarco.com @robjhyndman.com Matt Might and so on.

Bits In, Bits Out

Chinese farmer loads pig onto drone, accidentally flies into power line, causes blackout

The map equation turned 16 a week ago. Since @carlbergstrom.com and I published Maps of random walks on complex networks reveal community structure in PNAS: hierarchical, higher-order, temporal, overlapping variants. Our new ACM tutorial maps the landscape we created. dl.acm.org/doi/10.1145/3779648

I guess StackOverflow is done.

Computational Social Scientists in the Nordics, unite! 🇩🇰🇫🇮🇳🇴🇸🇪🇮🇸 The brand new Nordic Society for CSS welcomes all researchers and practitioners based in the Nordics. The Society will promote student mobility, events, and education initiatives. Join for free: nosocss.org/join.html.

Oh no! The sadness of seeing giants fall. Heros becoming ex-heros. Now it turns out that Oliver Sachs is a fraud too 😱😭 Insanely great piece in The New Yorker www.newyorker.com/magazine/202.... More links at kottke.org/25/12/the-li... (where I first saw this)

Super excited to work with great team of coauthors and play a (small) part in putting this excellent overview of higher order networks together!

This seems totally OK and not like a problem at all

One of the time-consuming tasks in paper writing is to curate bibtex for references. So I automated bibtex curation with an Alfred app that fetches entries from dx.doi.org using DOI or title. It saves time, reduces errors, and maintains consistent LaTeX keys. github.com/skojaku/tobi...

📌 Save the Date! The flagship conference of the Network Science Society - 𝗡𝗲𝘁𝗦𝗰𝗶 𝟮𝟬𝟮𝟲 - is coming to Northeastern University’s Network Science Institute, 𝗝𝘂𝗻𝗲 𝟭-𝟱, 𝟮𝟬𝟮𝟲. Prepare to share ideas, discoveries & challenges in network science. Registration opens soon! 🔗 www.netsci2026.com

It was a ton of fun to play a small role in this project lead by the brilliant Marta Ewa Lech & @jonassjuul.bsky.social. A lot of drama & change in the world of music reflected in the song-dynamics of the Billboard Hot 100!

New paper out in EPJ Data Science! We analyze 65 years of Billboard Hot 100 data to ask: 🎵Are songs moving differently up and down the chart nowadays? 📉 Are hits shorter-lived? 📈 Or do superstars dominate more than ever? Paper: epjdatascience.springeropen.com/articles/10.... 🧵 1/7

🎶 If you want to kiss the sky, better learn how to kneel On your knees, boy … She's the wave, she turns the tide She sees the man inside the child … It's all right, it's all right, it's all right She moves in mysterious ways 🎶 (Unless you normalize using the pair distribution function)

In this article, Boucherie et al. apply physics-based models to the arrangement of locations to study how geography shapes human movement. They find an underlying pattern in how people choose to move, independent of geographical layout.

New NERDS publication on hitting the music charts nerds.itu.dk/2025/09/04/n...