In a recent piece for the @wsj.com commentator @greg_ip cited a 2024 PNAS Nexus study by @johanneswachs.bsky.social + coauthors @maria-drc.bsky.social & N.Laurentsyeva showing that LLM can be a potential substitute for human-generated data & knowledge 📚 www.wsj.com/tech/ai/will...

In light of yet another scorching summer ☀️, new research by H. Schuster, A. Polleres, A. Anjomshoaa & @johanneswachs.bsky.social reveals how climate change 🌡️ + demographic aging 📈 intersect to shape health risks across Austrian districts. Read the full story 👉 rdcu.be/eD5XV

“Our conservative model finds that going from 0→30 % AI share (US 2020-24) predicts 2.4 % increase in commits. Using task & wage data on occupations, this implies genAI creates $9-14 bill/year in US software alone. Larger estimates of effects from RCTs imply $100 billion.“ arxiv.org/abs/2506.08945

Lots of neat stuff in this paper showing 30% of US python commits use AI As of the end of 2024: “the annual value of AI-assisted coding in the United States at $9.6−14.4 billion, rising to 64−96 billion if we assume higher estimates of productivity effects reported by randomized control trials”

How much code now comes from AI? With @simonedaniotti.bsky.social, @xfeng.bsky.social & Frank Neffke we estimate that by end-2024 30% of Python functions pushed by US devs on GitHub are AI-generated. Adoption is rapid but diffusion lags globally. How did we do it? arxiv.org/abs/2506.08945

How much code now comes from AI? With @simonedaniotti.bsky.social, @xfeng.bsky.social & Frank Neffke we estimate that by end-2024 30% of Python functions pushed by US devs on GitHub are AI-generated. Adoption is rapid but diffusion lags globally. How did we do it? arxiv.org/abs/2506.08945

New paper out in Nature Communications 📌 @anetilab.bsky.social members @lgajo.bsky.social and @johanneswachs.bsky.social with @loreb92.bsky.social and Federico Battiston explore "The dynamics of leadership and success in software development teams" 👾 Link to paper ➡️ www.nature.com/articles/s41...

Happy to see this finally out in @natcomms.nature.com! 🎉 "The dynamics of leadership and success in software development teams" www.nature.com/articles/s41... Amazing collaboration with @lgajo.bsky.social, @johanneswachs.bsky.social and @fede7j.bsky.social

🎉 New publication in PNAS: Urban highways are barriers to social ties www.pnas.org/doi/10.1073/... We illustrate from numerous aspects that highways are physical barriers that cut opportunities for social connections—in the 50 largest metropolitan areas in the US.

🎉 New paper in PNAS: Urban highways are barriers to social ties https://www.pnas.org/doi/10.1073/pnas.2408937122 Highways are barriers that cut opportunities for social ties. We quantify this effect by overlaying the US highway network with millions of social ties from Twitter.

"Urban Highways Are Barriers to Social Ties" out on PNAS! The 1st large-scale measure of how highways weaken social connections between the communities they separate. This barrier effect is strong in the 50 largest US cities--especially for low-income Black communities. www.pnas.org/doi/10.1073/...

Urban highways are barriers to social connections, report by @itu.dk : en.itu.dk/About-ITU/Pr...

23/250 is Large language models reduce public knowledge sharing on online Q&A platforms This makes me wonder if people are answering Stack Overflow questions with ChatGPT answers . . .

🧵🧪 New paper alert! We studied how firms consume information by analyzing online reading patterns across millions of organizations. Some fascinating patterns emerged... (1/7)

AI for science could be more impactful than chatbots. It is already helping win Nobel prizes and accelerating drug development and materials discovery. Today we published an essay about it: why it matters, how it’s happening and its implications. Here is a summary from an econ / social sci lens.

New preprint on innovation in OSS /w Gabor Meszaros: arxiv.org/abs/2411.14894 We extract library import statements from Stack Overflow posts in 12 languages. These elementary building blocks of code appear at a slower rate as ecosystems grow. But novel combos of libraries grow linearly.

New preprint on innovation in OSS /w Gabor Meszaros: arxiv.org/abs/2411.14894 We extract library import statements from Stack Overflow posts in 12 languages. These elementary building blocks of code appear at a slower rate as ecosystems grow. But novel combos of libraries grow linearly.

@koren.mk @gaborbekes.bsky.social

Our paper on the effect of ChatGPT on activity on @stackoverflow.com.web.brid.gy is out: academic.oup.com/pnasnexus/ar... @maria-drc.bsky.social, Nadzeya Laurentsyeva & I find a 25% decrease in activity on SO within 6 months of #ChatGPT 's release vs counterfactuals. Why does it matter?

Our paper on the effect of ChatGPT on activity on @stackoverflow.com.web.brid.gy is out: academic.oup.com/pnasnexus/ar... @maria-drc.bsky.social, Nadzeya Laurentsyeva & I find a 25% decrease in activity on SO within 6 months of #ChatGPT 's release vs counterfactuals. Why does it matter?

I'm hiring a postdoc in beautiful Budapest at the Center for Collective Learning at Corvinus U to work on the econ & geography of software and digitalization! Collaborate with a wonderful cluster of people at CCL & ANET/NETI Labs. 30 months, no teaching req. Deadline Jan 30 tinyurl.com/4rn86v84

Paper is out! Together with Camelia Oprea and Markus Strohmaier, we have explored the potential impact of toxic comments on Wikipedia: academic.oup.com/pnasnexus/ar...

I'm hiring a postdoc in beautiful Budapest at the Center for Collective Learning at Corvinus U to work on the econ & geography of software and digitalization! Collaborate with a wonderful cluster of people at CCL & ANET/NETI Labs. 30 months, no teaching req. Deadline Jan 30 tinyurl.com/4rn86v84

🚨Amenity complexity and urban locations of socio-economic mixing🚨 -- our paper is out in EPJ Data Science We combine urban mobility data with economic complexity ideas to identify places where socio-economically diverse people are more likely to meet.