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Impact Factor versus true probability
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08-21-2007, 08:08 PM
#
38
Dave Schwartz
Authorized Advertiser -- PaceMakesTheRace.com
Join Date: Mar 2001
Location: Reno, NV
Posts: 16,908
GameTheory,
Quote:
IV = ( %winners with factor ) / ( % starters with factor )
IMHO, a better formula is:
Wins / ExpectedWins
where:
Wins=actual wins
ExpectedWins= the sum of 1/field for each horse in the sample.
Dave
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