[EM] Unranked IRV versus Approval - where do winners diverge?

[Tom Ruen]

As I've discovered UIRV does diverge from Approval in a very small
proportion of elections (2% of random ones anyway).

You're right it would be silly to take a complex method if it ALWAYS give
the same results as a simple one. I was hoping perhaps they were the same
since that might show Approval full votes don't matter. Being that they do
diverge, we have a chance to compare two methods on unranked ballots and
consider which better fits within our idea of a better winner.

Please do post about FBC.

Mainly I offer UIRV as a method that fits within the single-vote system that
we now use.

Tom

----- Original Message -----
From: "MIKE OSSIPOFF" <nkklrp at hotmail.com>
To: <election-methods-list at eskimo.com>
Sent: Thursday, March 29, 2001 3:07 AM
Subject: Re: [EM] Unranked IRV versus Approval - where do winners diverge?


>
>
> >What if Unranked-IRV is equivalent to Approval (for single seat
> >elections)?!
>
> >My intuition offers a sweet reply, although I may be wrong.
> >
> >It can't really be! But where is a counter-example? I would think if it
is
> >false, a counter example would exist for 3 candidates.
>
> Didn't I post an example of UIRV failing FBC? I'll post it tomorrow.
>
> But even if it turned out that UIRV always gave the same outcome as
> Approval, with the same voting, why would you want that more
> complicated method?
>
>
> Mike Ossipoff
>
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