CLIP: When was a Derby Horse born?

from the 5/2/18 Wharton Moneyball Podcast ... "In Gladwell's book, he pointed out in the NHL all these great players were all born in January and February. The leagues are all by age, and so they're older than the other kids and they get the best coaches, and they do the best early, and they go in the best leagues so there's a huge skew toward hockey players born early in the year. Well, in horse racing, every horses's birthday is officially January first. So you're a three-year-old on January first but they're born anywhere from January through June. Since they are only three years old and aren't mature till five you're talking about adolescence. A horse that was born in January is almost forty months old and a horse that was born in May or June is thirty-five or thirty-six months. (In people) it's like fourteen-year-olds versus sixteen-year-olds. It's a big deal." Jeff Seder