Re: [EM] Schulze Method (Markus Schulze)

2010-09-19 Thread Kristofer Munsterhjelm

Kathy Dopp wrote:

Markus,

Unfortunately I don't have time to study it now, but a quick perusal
makes it seem written in a clear, easily-understood style of writing.

Am I to assume that this method solves the problem of irrelevant
alternatives (the spoiler problem) in all cases unlike both plurality
and IRV?

I do not know what "clone-independent" means (perhaps I should by now).


No rank ballot system can meet IIA while electing an unanimous preferred 
candidate and having no dictator. (That doesn't mean Schulze is as bad 
as IRV, though, only that "perfection" cannot be attained.)


Clone-independence means that if one adds or removes candidates from a 
set that all voters vote next to each other (but not necessarily in the 
same order), that shouldn't cause someone in the set to lose if someone 
in the set won before the modification, and nor should it cause someone 
in the set to win if a candidate outside the set won before the 
modification. Intuitively, it means that a party shouldn't lose (or win) 
merely by splitting.


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Re: [EM] Schulze Method (Markus Schulze)

2010-09-19 Thread Kathy Dopp
Markus,

Unfortunately I don't have time to study it now, but a quick perusal
makes it seem written in a clear, easily-understood style of writing.

Am I to assume that this method solves the problem of irrelevant
alternatives (the spoiler problem) in all cases unlike both plurality
and IRV?

I do not know what "clone-independent" means (perhaps I should by now).

Thanks.

Kathy

> Date: Sat, 18 Sep 2010 22:27:07 +0200
> From: Markus Schulze 
> To: election-meth...@electorama.com
> Subject: [EM] Schulze Method
> Message-ID: <7.0.1.0.1.20100918222504.06bd6...@alumni.tu-berlin.de>
> Content-Type: text/plain; charset="us-ascii"
>
> Hallo,
>
> I have uploaded a new version of my paper
> "A New Monotonic, Clone-Independent, ...":
>
> http://m-schulze.webhop.net/schulze1.pdf
>
> I have shortened my paper from 167 pages
> to 64 pages. The new version is simpler
> and more stringent than the old version
> (because, in the new version, I use one
> and only one heuristic for the Schulze
> method). The proofs are simpler because
> I moved the random ballot tie-breaker
> from section 2 to section 5.
>
> Markus Schulze
>
>
>

Kathy Dopp
http://electionmathematics.org
Town of Colonie, NY 12304
"One of the best ways to keep any conversation civil is to support the
discussion with true facts."

Fundamentals of Verifiable Elections
http://kathydopp.com/wordpress/?p=174

Realities Mar Instant Runoff Voting
http://electionmathematics.org/ucvAnalysis/US/RCV-IRV/InstantRunoffVotingFlaws.pdf

View some of my research on my SSRN Author page:
http://ssrn.com/author=1451051

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[EM] Schulze Method

2010-09-18 Thread Markus Schulze
Hallo,

I have uploaded a new version of my paper
"A New Monotonic, Clone-Independent, ...":

http://m-schulze.webhop.net/schulze1.pdf

I have shortened my paper from 167 pages
to 64 pages. The new version is simpler
and more stringent than the old version
(because, in the new version, I use one
and only one heuristic for the Schulze
method). The proofs are simpler because
I moved the random ballot tie-breaker
from section 2 to section 5.

Markus Schulze



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