Just found a very interesting stat ....

Why do favs win in early races .... Its becuase of the field size ...

Races 1- 4 have a larger proportion of smaller fields and therefore the strike rate of the fav increases in line with these proportions.

So really when you say more favs win in early races you are really saying more favs win in smaller fields which is just logical.

For example race 1 has three times more races with 7 or less runners than race 5.

Good Luck.