Some evidence...

In his forthcoming article E. Woodrow Eckard (University of Colorado, Denver) finds evidence that the Bowl Championship Series (BCS) in College Football is indeed a cartel. In my blog I discussed the matter as well.

Here is the link to the article (Journal of Sports Economics):
http://jse.sagepub.com/content/early/2011/07/15/1527002511414719.abstract