This is just empirical, that the vig is roughly 4-5% for long and short bets alike. But the math works out that for a fixed vig, long bets lose more EV because the vig is larger as a fraction as your chance of winning,
This is just empirical, that the vig is roughly 4-5% for long and short bets alike. But the math works out that for a fixed vig, long bets lose more EV because the vig is larger as a fraction as your chance of winning,