Jerry D. Gardner completed this course, spending 6 hours a week on it and found the course difficulty to be medium.
This was a terrific introduction to causal inference including basic concepts as well as tests and exercises that reinforced learning. One important problem, however, is that the code for some of the exercises had bugs in it. Although I had never used R previously, I was able to identify and correct some of the problems. In the IPTW exercise, I was unable to execute the code and posting my difficulty to the Discussion resulted in a reply that simply reiterated my problem. Hopefully, the instructor will make sure that the code is valid for future attendees.