Sorry if this has been discussed in the past, but is there a magic formula that the TAB uses to adjust the odds on each selection.

Let me put it another way, and I am referring to place betting here.

Has anybody put a bet of say $500 for a place on a horse and seen the payout suddenly change from $1-50 to $1-10?

Can it be that sensitive?

I know it is based on the pool, so if the place pool is only $10,000 and you are going to be backing a favourite which is at the moment $1-50, what would be a limit to your bet size to prevent the price dropping dramatically?

$100, $500, $1,000?

In the above example, would a $1,000 bet drop it to $1-10?

Moving up to a pool where you have a $50,000 place pool, would $500 or $1,000 place bets effect it much?

Thanks