[EM] Re: Does MAM use the Copeland method?
Paul Kislanko
kislanko at airmail.net
Wed Oct 6 13:10:02 PDT 2004
That example was the first that convinced me that there was a lot of work to
be done to get one that can be explained to the voting public.
For the same set of ballots, pairwise comparisons result in a different
winner based upon which voting method is employed. So which one you use is
an article of faith, not reason.
> -----Original Message-----
> From: election-methods-electorama.com-bounces at electorama.com
> [mailto:election-methods-electorama.com-bounces at electorama.com
> ] On Behalf Of Ted Stern
> Sent: Wednesday, October 06, 2004 2:54 PM
> To: election-methods at electorama.com
> Subject: [EM] Re: Does MAM use the Copeland method?
>
> On 6 Oct 2004 at 12:13 PDT, Paul Kislanko wrote:
> > Ok, let us just get this straight. I don't give a flying flip about
> > any criterion, and I don't have a favorite method.
> >
> > I merely observe from the original ballots that 5 of 9
> voters prefer C
> > over A. So those are the ones who will be unhappy if A is elected.
>
> But how unhappy will they be? Only 3 of those voters
> strongly disapproved A.
> The 2 voters who wanted C in first place are actually happy
> that B didn't win (B wins approval), since B>C.
>
> >
> > That majority will initiate a referndum that changes the
> voting method
> > because it selected the "wrong" candidate from the VOTERS
> perspective.
>
> What makes you think it would pass? Bucklin and Approval
> give the election to B, but the A voters are happy, and the C
> voters would rather not end up with B winning, so 2/3 of the
> voters would vote to keep Condorcet.
>
> >
> > You academics can say A is right, but if that is so, this just
> > demonstrates that Plurality does as well as anything.
>
> Just in this case. Who should win this example? (from Rob LeGrand)
>
> 98:A>C>E>D>B
> 64:B>A>E>C>D
> 12:B>A>E>D>C
> 98:B>E>A>C>D
> 13:B>E>A>D>C
> 125:B>E>D>A>C
> 124:C>A>E>D>B
> 76:C>E>A>D>B
> 21:D>A>B>E>C
> 30:D>B>A>E>C
> 98:D>B>E>C>A
> 139:D>C>A>B>E
> 23:D>C>B>A>E
>
> A B C D E
> A --- 458 461 485 511
> B 463 --- 461 312 623
> C 460 460 --- 460 460
> D 436 609 461 --- 311
> E 410 298 461 610 ---
>
>
> B>E : 623
> E>D : 610
> D>B : 609
> A>E : 511
> A>D : 485
> B>A : 463
> A>C, B>C, D>C, E>C : 461
>
> A wins Beatpath, B wins MAM (and plurality), C wins MinMax, D
> wins IRV, E wins Bucklin.
>
> Ted
> --
> Send real replies to
> ted stern at u dot washington dot edu
>
> Frango ut patefaciam -- I break that I may reveal
>
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