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THE BOOK--Playing The Percentages In Baseball

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Friday, June 27, 2008

Are home teams cheating this year?

By , 04:03 AM

So far this year, the home team has won 56.64% of its games.  The last 3 full years (05-07), the home team WP has been 54.2%.  The difference in 1174 games so far in 2008 is 1.65 SD.  The difference may even be less than that because in 2005, while the home team won 53.7% of its games, the home and road team run scoring suggested that the true home team WP was 54.4% (using a basic pythag formula).

This year, the home and road run scoring suggests a true 56.4% home team WP (as opposed to an actual WP of 56.6%), so perhaps we can say that the home team wp is 2% higher than over the previous 3 years.

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(22) Comments • 2008/07/16 • SabermetricsIn-game_Strategy
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June 27, 2008
Are home teams cheating this year?