venta

No problem. The best articulation I have seen of why the value of votes does not change between rounds is here. It may also help to think of it as equivalent to a multi-round knock-off vote of the type used on The X-Factor, except with voters expressing all their preferences from the start, rather than being asked to vote again each time a candidate is eliminated. Basically, what's happening is that at each round, all voters are effectively voting again from scratch - it's just that those whose first preference is still in the race are assumed still to back that candidate, whereas those whose favourite candidate has been eliminated have to make a new choice.