Freakonomics or the existence of cheating among sumo wrestlers

The following is a tweet from The Daily Yomiuri:
"Text messages implying match-fixing were found on #sumo wrestlers' cell phones seized by Tokyo police in July, sources reveal. #Japan"

There was a baseball-betting scandal among sumo wrestlers last year.
"The Metropolitan Police Department (MPD)'s organized crime division arrested three former sumo wrestlers and a woman on Jan. 26 on suspicion of involvement in a baseball-betting scandal that shook the sumo world to its foundations last year." http://bit.ly/euBhPz

In the process of the investigation, evidence was found that shows there had been cheating or match-fixing among sumo wrestlers.

In 2005, "Freakonomics" demonstrated the existence of cheating among sumo wrestlers, relying on a statistical analysis. Freakonomics does not use ordinary economic theories. It is a statistical analysis of social problems.
http://en.wikipedia.org/wiki/Freakonomics