This is the perfect (and essential) supplement for all econometrics classes--from a rigorous first undergraduate course, to a first master's, to a PhD course.<br><ul><br><li>Explains what is going on in textbooks full of proofs and formulas <br><li>Offers intuition, skepticism, insights, humor, and practical advice (dos and don&#8217;ts) <br><li>Contains new chapters that cover instrumental variables and computational considerations <br><li>Includes additional information on GMM, nonparametrics, and an introduction to wavelets</li></ul><br><p></b>