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UFC Referees and the Power Law
by Mike Fagan | [SOURCE]
Without using Google or Wikipedia, name five American MMA referees.

If you're like 98% of the global population (ed. note: figure cannot be verified), you probably listed some combination of John McCarthy, Herb Dean, Steve Mazzagatti, Mario Yamasaki, Yves Lavigne, and Dan MIragliotta. Why is that?
Well, it can all be explained by the Power Law. Here's a layman's explanation from Advanced NFL Statistics:

Have you ever noticed how most of the productivity around your office seems to be accomplished by a minority of your co-workers? It’s no different in the NFL, or most anywhere else.

The power law is all around us, and is a fundamental property of natural organizations of all types. City sizes, for example, are distributed according to the power law. There are a few extremely large cities, more average sized cities, and very many smaller towns. Earthquake sizes, the structure of the Internet, stock market gains and losses, body mass indexes, gravity, social network connections, wealth distributions, and even Kevin Bacon movies all follow power law distributions. If you've ever heard people refer to the "fat tail" or the "long tail," this is what they're referring to. (Fagan, Mike; 05.09.2009 Retrieved HERE)

The distribution of MMA referees in the UFC is no different. Our first example highlights this concept based on the amount of fights reffed by each official since the introduction of the Unifed Rules. (As always, click the picture to view the full-sized imag