This concise textbook is an introduction to econometrics at the graduate or advanced undergraduate level. It differs from other books in econometrics in its use of the Bayesian approach to statistics. This approach, in contrast to the frequentist approach to statistics, makes explicit use of prior information and is based on the subjective view of probability, which takes probability theory as applying to all situations in which uncertainty exists, including uncertainty over the values of parameters.
One of the worst textbook I've ever read during my academic years. Unclear, chatotic, unorganized. As the case with many econometricians (aka social "scientists" trying to do math), Greenberg himself doesn't seem to have a clear understanding of the subject matter, judging by that nonsense of book he wrote.