Principles of Econometrics is an introductory book for undergraduate students in economics and finance, and can be used for MBA and first-year graduate students in many fields. The 4th Edition provides students with an understanding of why econometrics is necessary and a working knowledge of basic econometric tools. This text emphasizes motivation, understanding and implementation by introducing very simple economic models and asking economic questions that students can answer.
I am sure this was a good text when it used to be up to speed, but it is a little dated by now. It is also a little longer than I would have preferred as I do not need a comprehensive econometrics text. Econometrics is a very simple subject matter and does not require this many pages (it's extremely long).