The evidence is solid but not definitive, as the conclusions rely on the absence of changes in spatial breadth and would benefit from clearer statistical justification and a more cautious ...

Background/aims Posterior capsule opacification (PCO) is the most frequent long-term complication after cataract surgery, caused by proliferation of residual lens epithelial cells (LECs). Metformin, a ...

AI I tested ChatGPT-5.2 vs Claude 4.6 Opus in 9 tough challenges — here’s the winner AI I spent 24 hours with Claude Opus 4.6 — here's why it feels more human than any other AI I've tested ...

Economists often rely on estimates of linear fixed effects models developed by other teams of researchers. Assessing the uncertainty in these estimates can be challenging. I propose a form of sample ...

VALLEY FORGE, PA — Vanguard has expanded its suite of model portfolio solutions with the launch of two new dynamic asset allocation fixed income models designed for financial advisors. The ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Thank you for your excellent work on fixest and pyfixest. As a heavy user of R and Python (and not very familiar with Stata), I was thrilled to discover these packages. Thanks again! However, I have a ...

Abstract: The fixed effects model is a widely used statistical method in panel data analysis as it eliminates the heterogeneity that cannot be observed at the individual or temporal level. The model ...