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What does the social fabric of an entire country look like?
We built a nation-scale social network of Denmark — 7.2 million people, 1.4 billion ties, 14 years of data.
Here’s what we found 👇
📄 doi.org/10.1038/s415...
#NetworkScience #Sociology

I'm excited to present at @ic2s2.bsky.social in Norrköping! Wednesday at 10, I'll give a lightning talk about how to measure cross-class social connections (almost) everywhere on Earth. I'll also have two posters up in the Weds session. If you're here, I'd love to chat social networks, etc!

The Economist published an article today about my team's research on measuring social ties between men and women. The article had cool original analyses, including showing that the rate of cross-gender ties among close (top 5) friends is predicted by an index of sexism (a 🧵)

My team's paper on cross-gender friendships is out today in the AEA Papers & Proceedings. We use data from Facebook to show where connections between men and women are more (blue) and less (red) common, in almost every country, and release the data publicly!
A 🧵 of maps:

My team's paper on cross-gender friendships is out today in the AEA Papers & Proceedings. We use data from Facebook to show where connections between men and women are more (blue) and less (red) common, in almost every country, and release the data publicly!
A 🧵 of maps:

An amazing visualization from the NYT of some research from my team:
www.nytimes.com/interactive/...

I had a sneak peek at some data which is being published by Meta today, showing that Britain is less divided by class than you might expect: www.economist.com/britain/2025...

Realized I forgot a to include a map of cross-gender social ties in North America--details on the methodology (and a link to the data) can be found in the original thread!

Have you ever wondered how social networks differ by gender?
Check out my team's new dataset, which uses Facebook data to measure regional differences in social networks by gender all across the world!
A 🧵 with examples, a description of our methodology, and a link to download the data:

If you're considering an econ predoc, Theresa Kuchler + Johannes Stroebel are hiring a predoc to work on social networks projects, starting fall 2025. They are wonderful to work with and do very cool research (see www.nature.com/articles/s41...) . Apply at: apply.interfolio.com/161883

I'm presenting "Social Capital Around the World" Saturday @ 8am at AEAs. We use data from 2.5 billion Facebook accounts to measure cross-class and cross-gender friendships globally, and explore how they connect to downstream outcomes like intergenerational mobility. www.aeaweb.org/conference/2...