Regression Equations, Generalized Least Squares, Correlation Matrices, Python, Statsmodels.
Image by Gerd Altmann from Pixabay (Pixabay license)  How to fit a system of regression equations using Python and Statsmodels In this article, we’ll walk through a tutorial on how to fit a system of linear regression models using the Generalized Least Squares (GLS) technique. We’ll use the term