"RebelText: Essentials of Econometrics" is an alternative to traditional textbooks. It is written as a compact book for upper-division undergraduate econometrics classes, and it comes with its own €œliving€ website. You can also use the book and website as part of a self-paced, independent-study course or as a companion for graduate-level texts. We strive to present best practices and state-of-the-art methods for doing intermediate econometric work. The knowledge in these pages should poise anyone for further study or to venture out into the real world with essential econometric concepts and tools, along with a feel for the subject that is not found in other undergraduate texts. "I want to thank you for creating RebelText. Not only is it more enjoyable to read than our dry textbook, it's much more concise and follows our lectures perfectly. €"Trevor Proctor, UC Davis Student