books.google.com - Matrix Algebra is the first volume of the Econometric Exercises Series. It contains exercises relating to course material in matric algebra that students are exoected to know while enrolled in an (advanced) undergraduate or a postgraduate course in econometrics or statistics. The book contains a comprehensive...http://books.google.com/books/about/Matrix_Algebra.html?id=N871f_bp810C&utm_source=gb-gplus-shareMatrix Algebra