There were a few typos in appendix that have now been corrected.

Oct. 28, 2013 12:24 PM

There was a typo in problet set 3, problem 3e. This is now corrected.  I have also changed the wording of problem 1a. 

Oct. 2, 2013 9:14 AM

The typo in problem set 1 has now been corrected

Sep. 9, 2013 2:21 PM

There is a typo in problem set 1, problem 1d.  It should be "show that y is labor intensive".

Sep. 9, 2013 2:15 PM

Christine Næss

Sep. 4, 2013 1:22 PM