PyData Berlin Talk on our new within Fixed Effect Solver

Python
econometrics
PyFixest
Author

Alex Fischer

Published

August 18, 2026

Yesterday I was in Berlin for the day and presented at the local PyData Meetup on our new solver for fixed effects regression. It was of course a lot of fun! The development was prompted by an issue we received via github a couple of months ago:

Hours vs minutes! Urgh. Luckily, we’ve made some progress in between, so the issue could be closed with with

If you are curious how the new solver works, you can find the slides for the talk here, and please make sure to take a look at the code or to even run a regression with it! We also have a longer write up up in preparation, but as unfortunately is too often the case, the Pareto principle bites and we’ve been refining the last 20% for quite a while now.

Benchmarks with Torch CUDA