Econometrics is the study of estimation and inference for economic models using economic data. Econometric theory concerns the study and development of tools and methods for applied econometric applications. Applied econometrics concerns the application of these tools to economic data.
Mostly logging grad school textbooks for what I want to use when I hopefully end up teaching. In that case, I will probably use this to teach the subject if in six years they let me. Treatment of GMM was a little confusing and difficult to follow though