Note: This post builds and improves upon an earlier one, where I introduce the Gapminder dataset and use it to explore how diagnostics for fixed effects panel models can be implemented.

Note (July 2019): I have since updated this article to add material on making partial effects plots and to …

In working with linear fixed-effects panel models, I discovered that I had to develop goodness-of-fit tests and diagnostics on my own, as the libraries for working with these kinds of models haven't progressed that far yet.