You can find out from a weekly column by yours truly available at:
http://www.employmentpolicy.org/topic/403/blog/mitchell%E2%80%99s-musings-8-5-13-heads-we-win-tails-you-lose-online-higher-education [Click on the pdf option.]
Or read below:
Riddle: Why is a MOOC like the Bay Bridge?
Interesting post (as usual). However, I believe that the MOOC with the 50% failure rate occurred at San Jose State University rather than at San Diego State. The citation refers to San Jose State University.