I found 8,150 post time favorites in this dataset, and the overall percentage of winning favorites was 35.77%. This is the percentage of race favorites who actually finished first. With entries and co-favorites, the actual # of winners was 7,996.
The interesting data (to me, at least): Saratoga’s winning favorites’ percentage was higher than the overall, at 36.66%. This means that favorites won more often at Saratoga than at all other NA tracks combined. This was for over 400 races in my dataset.
The second interesting thing was focusing on the major synthetic tracks: Keeneland (up until the Fall of last year, it was Polytrack), Arlington and Woodbine. {I know there are other synthetic tracks in NA, like PID-GG-TP, but they do not host major race meets, IMO.}. The favorites’ winning percentage at the three major synthetic tracks was 31.69%. This covered over 1,400 races.
All other tracks in NA (Belmont, Santa Anita, Gulfstream, Monmouth, etc. etc.) showed a favorites’ winning percentage of 36.64%. This covered over 6,100 races.
So, according to my analysis, Saratoga should no longer be labeled the graveyard of favorites … Statistically, their win pct was not significantly different than other (non-synthetic) tracks around the country.
FWIW