There were a few typos in appendix that have now been corrected.
There was a typo in problet set 3, problem 3e. This is now corrected. I have also changed the wording of problem 1a.
The typo in problem set 1 has now been corrected
There is a typo in problem set 1, problem 1d. It should be "show that y is labor intensive".
Department of Economics