Re: [EM] Condorcet How?

2010-03-22 Thread Markus Schulze
Hallo,

here are some interesting videos on IRV in Burlington:

http://www.cctv.org/watch-tv/programs/instant-runoff-voting-interviews
http://www.cctv.org/watch-tv/programs/irv-or-down-instant-runoff-voting-debate

I have the impression that there was no reasonable
debate on IRV. Most anti-IRV arguments were
ridiculous or simply false. The anti-IRV campaign
was a pure anti-Kiss campaign.

> in fact, if the election was decided with Condorcet
> rules (doesn't matter which, since there was no cycle),
> these same Republicans would have bitched all the more,
> since the Condorcet candidate had only 23% and came
> third in plurality.  so the primary political motivation
> behind the repeal was not due to that the Condorcet
> winner was not elected.

I agree that the Republicans would also have attacked
Condorcet. But as Montroll was preferred to Wright with
56% against 44%, an anti-Condorcet/anti-Montroll campaign
wouldn't have been successful.

Markus Schulze



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Re: [EM] Condorcet How?

2010-03-22 Thread robert bristow-johnson


On Mar 22, 2010, at 6:17 AM, Markus Schulze wrote:


here are some interesting videos on IRV in Burlington:

http://www.cctv.org/watch-tv/programs/instant-runoff-voting-interviews
http://www.cctv.org/watch-tv/programs/irv-or-down-instant-runoff- 
voting-debate


i've seen them.  if i had reacted more quickly, i would have appeared  
in one of them.  (i was one of the questioners in the debate, but  
they "didn't understand [my] question" so neither side answered it.   
it was very frustrating.)



I have the impression that there was no reasonable
debate on IRV.


there surely was little reasonable debate.


Most anti-IRV arguments were ridiculous or simply false.


they surely were either ridiculous or false.  fueled by some good  
analysis from Warren Smith, but they misused the result.



The anti-IRV campaign was a pure anti-Kiss campaign.


not purely, but the fact that Kiss is in so much trouble provided a  
lot of fuel for the anti-IRV campaign.



in fact, if the election was decided with Condorcet
rules (doesn't matter which, since there was no cycle),
these same Republicans would have bitched all the more,
since the Condorcet candidate had only 23% and came
third in plurality.  so the primary political motivation
behind the repeal was not due to that the Condorcet
winner was not elected.


I agree that the Republicans would also have attacked
Condorcet. But as Montroll was preferred to Wright with
56% against 44%, an anti-Condorcet/anti-Montroll campaign
wouldn't have been successful.


Markus, the main complaint (besides that Kiss, who was considered by  
these Republicans to be such a bad mayor and he was elected via IRV)  
was against the Ranked Ballot.  their slogans were: "Keep Voting  
Simple" and "One person, one vote".  their main factual indictment  
against IRV is that it elected someone whom 71% of the electorate  
voted *against*.  what would they say if it were Condorcet and the  
candidate that 77% voted against was elected?


I don't know if an "anti-Condorcet/anti-Montroll campaign" would have  
been successful or not, but I am not as confident that it would fail  
as you Markus, and I live here in Burlington.  I *do* know that the  
oft cited pathologies noted by Smith (picked up locally by UVM Prof.  
Anthony Gierzynsky) would not have applied, since there was  
absolutely no cycle, all candidates were very well ordered from a  
Condorcet POV.


I would like to think that if it were Condorcet from the very  
beginning that Preferential Voting would survive, but these IRV  
opponents were also rabid ranked-ballot opponents ("Keep Voting  
Simple! One person, one vote! Keep Voting Simple! One person, one  
vote!").  They believe that God Herself ordained the "traditional  
ballot" (as well as Washington, Jefferson, and Madison) and that  
changing from that is heresy in the religion of democracy.


--

r b-j  r...@audioimagination.com

"Imagination is more important than knowledge."





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Re: [EM] Proportional Representation Systems I'd Support

2010-03-22 Thread Kathy Dopp
Upon cursory reflection and in response to my strong opposition to any
nonmonotonic method and to any method that fail to treat all voters'
votes equally, the only proportional method I know I would support for
legislative representation would be the party list system where
candidates appear only on one list, where parties can cross-endorse
another party's list instead of presenting their own list for any
particular contest. But I don't know how fractional left-over vote
shares are handled when this system fails to initially elect all the
seats with the required vote share per seat.  Is that when two or more
parties join forces to elect the rest of the seats and haggle over who
fills them?

Are there any other proportional methods besides the party list system
that are monotonic and treat all voters' votes equally (unlike IRV and
STV where some voters' votes rankings are counted when it would matter
and some are not)?

Kathy

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Re: [EM] Proportional Representation Systems I'd Support

2010-03-22 Thread Kristofer Munsterhjelm

Kathy Dopp wrote:

Upon cursory reflection and in response to my strong opposition to any
nonmonotonic method and to any method that fail to treat all voters'
votes equally, the only proportional method I know I would support for
legislative representation would be the party list system where
candidates appear only on one list, where parties can cross-endorse
another party's list instead of presenting their own list for any
particular contest. But I don't know how fractional left-over vote
shares are handled when this system fails to initially elect all the
seats with the required vote share per seat.  Is that when two or more
parties join forces to elect the rest of the seats and haggle over who
fills them?

Are there any other proportional methods besides the party list system
that are monotonic and treat all voters' votes equally (unlike IRV and
STV where some voters' votes rankings are counted when it would matter
and some are not)?


As far as I've understood it, what you'd like is a method that is:

- proportional (fair)
- monotone
- summable (so it can be audited)
and provides good results.

This is very difficult. The only method I know of that passes all the 
criteria is party list PR. STV only passes proportionality, while my 
experimental method is monotone and proportional but not summable.


Some methods that are only proportional under strategy can pass all of 
those criteria. SNTV is one: vote for a single candidate, and when you 
want to populate the council, pick the k with the greatest number of voters.
A party that fields too few candidates will be worse off because they 
could have got more, while on that fields too many spreads itself too 
thin and so loses all. Therefore, each will have a number of candidates 
proportional to their estimated support. However, that is really just 
proportional by party and so a complex type of party list PR, and it 
requires central coordination (by the parties, to be absolutely certain 
no prospective candidates would wander off, become independents, and 
draw away votes).


-

I think your more complex party list PR (with cross endorsement) could 
work while still passing all three criteria. It's certainly summable and 
proportional, so the only difficulty would be in making it monotone. 
Simply distributing excess turns it STV-like. Perhaps something similar 
to my divisor trick could be used, but I'm not sure how.


One simple method meeting all three criteria, after a fashion, would be 
a cumulative party list: each voter gives each party between one and ten 
points. Each ballot is normalized by dividing each rating by the sum of 
how many point the voter gave, so every ballot has the same power. Then 
simply sum them up.
Here, voters can support more than one party. The problem is that there 
isn't any contingency mechanism, so voting for a minor party may still 
waste your vote (because less of your vote goes to the other parties). 
It's only proportional according to the normalized vote counts.


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Re: [EM] Condorcet How?

2010-03-22 Thread Markus Schulze
Dear Robert,

are you the questioner at 00:42:00 -- 00:44:25?

Markus Schulze



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[EM] Proportionality-preference tradeoffs

2010-03-22 Thread Kristofer Munsterhjelm
After reading the post on measuring multiwinner goodness (and writing a 
reply to it), I started to think of how to determine how good the 
different multiwinner methods actually are.


One way to do that is by criterion compliance. But there is another: 
while proportionality can't be expressed in terms of majoritarian 
quality (preference), we can still determine the Pareto front, given a 
way to measure proportionality and preference.


There are many ways to do so - I have chosen one combination (normalized 
Sainte-Lague index and Bayesian regret). The results are here: 
http://munsterhjelm.no/km/elections/multiwinner_tradeoffs/


May it be of interest! :-)

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Re: [EM] Proportional Representation Systems I'd Support

2010-03-22 Thread James Gilmour
Kristofer Munsterhjelm  > Sent: Monday, March 22, 2010 9:24 PM
> I think your more complex party list PR (with cross endorsement) could 
> work while still passing all three criteria. It's certainly summable and 
> proportional, so the only difficulty would be in making it monotone. 
> Simply distributing excess turns it STV-like. Perhaps something similar 
> to my divisor trick could be used, but I'm not sure how.

This principle is well-known in electoral science where it described by the 
French term "apparentenement".  It has been used in
party-list PR voting systems at different times in France, Italy and 
Switzerland.  In France and Italy the "apparentenement" was
determined by the parties.  In the (much) more complicated Swiss system, the 
"apparentenement" is determined by each individual
voter.

The allocation of seats to parties is determined by applying either the d'Hondt 
formula or the Sainte-Laguë formula to the votes,
summed over the "apparentenement" partner-parties as necessary.

James Gilmour


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Re: [EM] Condorcet How?

2010-03-22 Thread robert bristow-johnson


On Mar 22, 2010, at 6:06 PM, Markus Schulze wrote:


Dear Robert,

are you the questioner at 00:42:00 -- 00:44:25?


it could be.  i dunno if i wanna load the video again and figure that  
out.  i was pointing out that the purpose we adopted IRV in the first  
place was to relieve the split majority the burden of strategic  
voting in the form of compromising.  the liberal majority did not  
have to make a painful choice between Prog and Dem as they would with  
the "traditional" ballot.  but that burden wasn't eliminated, but  
transferred to those that preferred Wright first, Kiss not at all,  
and Montroll somewhere in between.  (i like to call them "GOP Prog- 
haters".)  those folks actually caused the Prog to be elected purely  
by marking the GOP as their first choice.  whether it's Nader in 2000  
or Wright in 2009, we should be able to vote for our favorite without  
electing our least favorite.  but this minority group wanted to just  
toss that burden back to the majority group and i wanted to know if  
the anti-IRVers understood that and how they thought that it's better  
to burden the majority.


i was interrupted before i could frame the question and they said  
they didn't understand the question and didn't answer it.


the thing that was very irritating to me was that the pro-IRV folks  
surely didn't come to this knife fight with their knives sharpened.   
i couldn't even tell that they brought their knives.  there were so  
many dumb things the anti-IRV side said that should have been pounced  
on and was let go.


Terry Bouricius is also a Burlington resident and is known in  
Burlington for being the primary promoter of IRV (i think that's  
right, ain't it Terry?).  i didn't see him at the debate, but Rep.  
Mark Larson and someone from League of Women Voters were on the pro- 
IRV side and they didn't come fightin', in my opinion.  and part of  
the problem is that *they* didn't really understand or acknowledge  
the cascade of anomalies that resulted when the IRV election fails to  
elect the Condorcet winner as it did in 2009.


and, i'm not sure who, but someone introduced a measure in the state  
legislature to elected the governor by IRV (there is a perennial Prog  
candidate that doesn't get any traction because Vermont is not all  
like Burlington or Brattleboro).  but we know (and Kathy won't let us  
forget) that IRV is not "precinct summable" and that would be a  
ridiculous mess for a statewide election (they would have to transmit  
via internet, individual ballot data to the capitol for tabulation  
and then securely bring up a disk or thumb drive (and the original  
paper ballots) with the ballot data up for verification on a later  
date.  it's not so instant if the central counting location is  
distant.  more so now (after the IRV repeal), but that bill had  
essentially zero chance of being passed by the legislature and the  
introduction of it was not well conceived.  and that also should be a  
lesson to FairVote regarding where (and why) they should be marketing  
IRV.


i'm still mostly bent outa shape that wherever Preferential Voting  
was introduced to some population for use in government, it is also  
introduced only with the STV method of tabulation (under whatever  
name: "IRV" "RCV").  what a sad mistake.  i really think that  
FairVote and other IRV promoters should soberly assess the product  
that they are selling instead of continuing to focus on how they're  
gonna market it.  IRV is bound to screw up again and will, by  
association, sully the ranked ballot.


--

r b-j  r...@audioimagination.com

"Imagination is more important than knowledge."





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