The top 50 most expensive AdWords
wpmarketing.org
wpmarketing.org
Assuming it is a proxy for demand, most of it is student loans, other consumer debt refinancing, or branded commercial Education(tm) which is unlikely to ever actually recover cost for the user.
For-profit education/training, especially for "flashy" careers like cooking and art, basically seems like a scam. $20-40k/yr for a couple year to get a $30-50k/yr job? Really?
http://www.xedant.com/researches/top_500_adsense_keywords.ph...
(It iss certainly dated, and does not cite sources, but provides food for thought nonetheless).
And, the complete list is here for public consumption: https://docs.google.com/leaf?id=0B2QExXr67OcTZjNlNDYwMTktNmE...
http://www.adsenseheaven.com/zipped/pos5119664.zip
I use a simple perl script to attempt to grab the latest copy of the data each month as the naming convetion is always the same.
posXXXXXXX.zip - X's being numbers.
Enjoy.
It's older than that. It's actually from a year ago last March. My bad. I should have been clearer.