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.
  
 
- Explains what is going on in textbooks full of proofs and formulas
 
- Offers intuition, skepticism, insights, humor, and practical advice (dos and don’ts)
 
- Contains new chapters that cover instrumental variables and computational considerations
 
- Includes additional information on GMM, nonparametrics, and an introduction to wavelets