For more information on the cross section of those admitted, see this article: http://www.insidehighered.com/news/2013/12/13/georgia-tech-a...

Thanks for mentioning Al Bartlett here. This video is very relevant to this post and worth watching. Al Bartlett is a brilliant man and does a wonderful job explaining the profound implications of misunderstanding exponential growth. Here is another link to his videos: http://www.albartlett.org/presentations/arithmetic_populatio...