Ezekiel Emanuel of the Wharton School and the Perelman School of Medicine and Christian Terwiesch of Wharton are quoted about massive open online courses.
http://www.deutschlandfunk.de/massive-open-online-courses-lernen-ja-abschluss-nein.680.de.html?dram%3Aarticle_id=330515 Deutschlandfunk