http://chronicle.com/weekly/v52/i17/17c00101.htm
If you can figure out a way to read the entire article without subscribing, please let me know. I get my subscription by snail mail.
I couldn't get the article to work. They wanted me to log in. I know some professors who subscribe to it. When I get back, I'll see if any kept their copy. Otherwise, it's probably in the university library.