Interesting article I thought I would pass on.
http://www.wired.com/playbook/2011/01/qa-scorecasting/Here is a quick portion of it:
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Wired.com: So why does the home team win more often?
Wertheim: What?s really interesting is how consistent that truism is. The WNBA has almost the exact same home winning percentage as the NBA. A soccer league in Central America is almost the same as the Premier League. Japanese baseball has almost the same as MLB.
Before you even dig into the ?why?? of home-field advantage, you see the data that 100 years ago the home winning percentage in Major League Baseball was almost exactly the same as it is today, and you find the same in other sports.
