Well, it may be a very scholarly text on panel econometrics, but the cover promises otherwise. For a researcher with moderate knowledge of matrix algebra, and with no mood for diving into mathematical proofs, this book is practically useless. The examples are few and not explicit, and the text is not readable by anyone who is not the author and understands perfectly every little corner of the theory. A waste of money and I am planning to return it (maybe Amazon will give me the refund ;)