Aaron Roth
@Aaroth
CS prof at Penn. Amazon Scholar at AWS. Author of The Ethical Algorithm (w/ Michael Kearns). I study machine learning, privacy, game theory, and uncertainty.
Suppose you and I both have different features about the same instance. Maybe I have CT scans and you have physician notes. We'd like to collaborate to make predictions that are more accurate than possible from either feature set alone, while only having to train on our own data.

Come say hi at our #ICML poster today during Poster Session 1 (W-600)! Joint work with @Aaroth @mkearnsupenn @JessSorrell @marcel_hussing and Eric Eaton! arxiv.org/abs/2502.11828
I'm so excited to be joining @Penn as an Assistant Professor in CS (@CIS_Penn) in Fall 2026! I’ll be working on machine learning ecosystems, aiming to steer how multi-agent interactions shape performance trends and societal outcomes. I’ll be recruiting PhD students this cycle!
Agentic LLM tooling like Windsurf is amazing. But you can already tell from the interface (you can pick from two dozen models from half a dozen different model providers, seamlessly) that AI is going to be a commodity. Not at all clear that LLM developers will get the surplus.

Happy to share that our paper "The ICML 2023 Ranking Experiment: Examining Author Self-Assessment in ML/AI Peer Review" will appear in JASA as a Discussion Paper: arxiv.org/abs/2408.13430 It's a privilege to work with such a wonderful team: Buxin, Jiayao, @natalie_collina,…
America cannot long remain free, nor first among nations, if it becomes the kind of place where universities are dismantled because they don't align politically with the current head of the government.
Check out the terrific set of EC 2025 accepted papers! ec25.sigecom.org/program/accept…
seems like a good time to re-up these @Aaroth notes on Adaptive Data Analysis 😉 adaptivedataanalysis.com/lecture-schedu…