Note that I have added a few minor corrections an additions to "Supplement to lecture week 44". The additions are under "Conditions" and at the end of the note.
I discovered that the Stata instructions I gave for the graphs in the no-seminar-exercises for this week, referred to an older version of Stata. I have now updated the instructions (in case you had trouble reproducing those graphs).
The seminar today (17/9) is cancelled and the students are asked to join the seminar on Friday (21/9), 10:15-12 (same place). The reason is that I forgot to put the exercises for this week (supplementary exercises 1-4) on the net. Sorry about that!