Even for a graduate-level textbook, this text was unnecessarily pedantic. Worth skimming to understand the high-level ideas in econometrics, yet developing a nuanced understanding is not worth the time of a non-academic/research practitioner. For non-practitioners, this book is likely best used as a reference textbook for esoteric analysis, which unfortunately necessitates an initial read to understand the econometric tools at your disposal. I was definitely not the target audience, but I still benefitted from reading this text