Re: [EM] Saari's Basic Argument

2003-03-04 Thread Forest Simmons
On Mon, 3 Mar 2003, Steve Barney wrote: Forest: In message # 10970, why did you say wisely, as follows?: Kemeny (wisely) doesn't believe in cyclic symmetry removal [...] Do you mean to imply that the KR tie between ACB and BAC is more reasonable than the ABC outcome yielded by both

Re: [EM] Saari's Basic Argument

2003-03-03 Thread Forest Simmons
:BCA 5:BAC that the order of those operations matters in some cases. Please show me what you mean. SB --- In [EMAIL PROTECTED], Forest Simmons [EMAIL PROTECTED] wrote: On Thu, 27 Feb 2003, Steve Barney wrote: Forest: Apparently, as I thought, your method of decomposition

Re: [EM] MCA cut off points arbitrary?

2003-02-27 Thread Forest Simmons
On Wed, 26 Feb 2003, Gervase Lam wrote: Nevertheless, could MCA be tweaked a very tiny amount to get closer to the better fairness that Cardinal Ratings can give? May be this could be done by having a different Preferred cut-off point. Using an example, I suggested 2/3 of the votes instead

RE: [EM] Saari's Basic Argument

2003-02-27 Thread Forest Simmons
On Thu, 27 Feb 2003, Steve Barney wrote: Forest: Apparently, as I thought, your method of decomposition is to simply to remove cycles first, and then reversals. My point remains, then, that your decomposition method does NOT NECESSARILY yield the same outcome as Saari's matrix decomposition

RE: [EM] Saari's Basic Argument

2003-02-25 Thread Forest Simmons
On Fri, 21 Feb 2003, Steve Barney wrote: Forest: How do you decompose my example (from my last email, #10873), and what do you get?: 3:ABC 5:ACB 0:CAB 5:CBA 0:BCA 5:BAC Subtract out five copies of the cycle ACB+CBA+BAC. That leaves 3*ABC. Forest For more information about this

Re: [EM] Saari's Basic Argument

2003-02-21 Thread Forest Simmons
On Thu, 20 Feb 2003, Alex Small wrote: snip However, people electing politicians are clearly not machines. We have our idiosyncracies and legitimate differences of opinion, and we debate matters that don't have obvious, objectively correct answers. Because we don't behave or think like

Re: [EM] Blake's margins arguments

2003-02-21 Thread Forest Simmons
On Wed, 19 Feb 2003, Rob LeGrand wrote: Obviously, I couldn't agree more. :-) Thanks so much to all of you who have joined CAV. Those who haven't, please check us out at http://www.approvalvoting.org/ . Rob, I just checked out the CAV website. Very Good! For more information

Re: [EM] Majority Choice Approval and Bucklin

2003-02-20 Thread Forest Simmons
In the main version of MCA, the fifty percent plus of voters is only needed for electing a candidate on the basis of favorite status. In other words, if no candidate has favorite status on more than fifty percent of the ballots, then the candidate with the most approval is elected, even if no

Re: [EM] Saari's Basic Argument

2003-02-20 Thread Forest Simmons
On Tue, 18 Feb 2003, Steve Barney wrote: Here is a simpler example to illustrate the difference that the order in which cyclic and reversal terms are canceled does not matter when using the strictly correct method - as opposed to the method used by Forest Simmons and Alex Small, and in some

Re: [EM] Strong FBC

2003-02-20 Thread Forest Simmons
Alex, you're right! That's what happens when you try to simplify part of an argument while permuting letters so that the default is in alphabetical order :-) I'll forward a copy of the untampered original in a minute. On Tue, 18 Feb 2003, Alex Small wrote: snip Seems like the best option is

[EM] The Strong FBC (fwd)

2003-02-20 Thread Forest Simmons
In what follows you will find (most of) an argument showing that the Favorite Betrayal Criterion (FBC) is incompatible with neutrality and other weak assumptions when fully ranked ballots are employed. By neutrality the ballot set XYZ+ZYX cannot yield either X or Z as winner, so there are two

Re: [EM] Saari's Basic Argument

2003-02-20 Thread Forest Simmons
of ballots, you don't change this version of the Borda count. On Thu, 20 Feb 2003, Forest Simmons wrote: On Tue, 18 Feb 2003, Steve Barney wrote: Here is a simpler example to illustrate the difference that the order in which cyclic and reversal terms are canceled does not matter when using

Re: [EM] Blake's margins arguments

2003-02-19 Thread Forest Simmons
Suppose for the sake of argument that Blake is right in his (as I understand it) main reason for preferring margins over winning votes: Margins are better estimators than sheer numbers for deciding which candidate is likely to do the best job. Let's assume this is true if the margins are

[EM] Strong FBC

2003-02-14 Thread Forest Simmons
It seems to me that any neutral method that gives a three way tie to a reverse order pair (like the following ballot pair) cannot satisfy both Pareto and the strong FBC: 1 ABC 1 CBA . Here's my reasoning. Suppose that there are only two voters and one has already voted ABC. Suppose further

[EM] Name that Criterion

2003-02-06 Thread Forest Simmons
It seems reasonable that if S is a ballot set with a definite winner X, and T is any other ballot set, then sufficiently many copies of S added to T should result in a ballot set supporting X. As far as I can tell, all seriously considered deterministic methods (including IRV and Borda) satisfy

Re: [EM] Name that Criterion

2003-02-06 Thread Forest Simmons
On Thu, 6 Feb 2003, Alex Small wrote: Forest Simmons said: It seems reasonable that if S is a ballot set with a definite winner X, and T is any other ballot set, then sufficiently many copies of S added to T should result in a ballot set supporting X. Let me see if I can understand what

RE: Population paradox

2003-02-05 Thread Forest Simmons
On Wed, 5 Feb 2003, Narins, Josh wrote: A bias over time for small states? I think they are entirely incorrect. In actuality if the small states had exact proportional representation, they would have less voting power per citizen than the large states. See EM archives messages 8541 and 9054

RE: Population paradox

2003-02-04 Thread Forest Simmons
On Tue, 4 Feb 2003, Narins, Josh wrote: The only issue is the overall standard deviation between district sizes can sometimes be helped by _REDUCING_ the number of seats. FOr instance, at the last Apportionment (2000). Although 435 seats were given out, if only 432 had been, the

Re: [EM] Strong FBC, at last

2003-01-30 Thread Forest Simmons
On Wed, 29 Jan 2003, Alex Small wrote: I think the Partial Decisiveness condition removes the possibility of fractal boundaries, since I specified that the ties occur on a set of 4 dimensions (or N!-2 dimensions for N candidate races). I don't know much about fractal curves in a

Re: [EM] Strong FBC, at last

2003-01-30 Thread Forest Simmons
On Thu, 30 Jan 2003, Alex Small wrote: Well, what's the weakest condition we could impose to guarantee that the boundaries have normals? You've said that fractal boundaries don't necessarily have normals. Obviously boundaries specified by linear equations would have normals, except

Re: [EM] To Marquette, to Marquette ...

2003-01-29 Thread Forest Simmons
On Wed, 29 Jan 2003, Steve Barney wrote: ... BTW, one reason given in a news article for dropping Nanson's Method and reverting back to the plurality with a runoff was that they preferred voting twice, and felt that they could be more informed voters the second time around. What to do about

Re: [EM] Strong FBC, at last

2003-01-29 Thread Forest Simmons
Good work, Alex. I think the argument can be simplified so that it will generalize easier, but nobody else has faced up to it like you have. BTW it seems like every N+3 candidate election has a three candidate election embedded within it as far as each faction is concerned, since each faction

[EM] Joe Weinstein's Approval Strategy Idea

2003-01-24 Thread Forest Simmons
Remember that Joe W. once suggested approving as far down your preference order as you can without exceeding 50 percent probability of the winner coming from your approved set. Whether or not you should approve the next candidate (the one that would tip the scales to more than fifty percent)

Re: [EM] Nanson in Wisconsin or Michigan?

2003-01-23 Thread Forest Simmons
You might be interested in Demorep's ideas along these lines in message 8228 (Oct 20,2001) of the EM archives. The subject line is Low Tech Proxy P.R. Method. Further messages under that heading are 8233 and 8241. See also message 8249 of Oct 26, 2001 for a related idea of mine under the

RE: [EM] Saari's Basic Argument

2003-01-21 Thread Forest Simmons
On Sat, 18 Jan 2003, Steve Barney wrote: If you don't like Condorcet's example, how about this one, which I have looked at before: 5 ABC 3 BCA Can you give me the decomposition profile, T(p), for this example? This example is essentially the same as the 66% ABC 34% BCA example.

RE: [EM] Saari's Basic Argument

2003-01-17 Thread Forest Simmons
On Thu, 16 Jan 2003, Steve Barney wrote: Forest: In your example, 66 ABC 34 BCA If you give second preferences any more than 16/33 of the weight which you give to the first prefs, the winner is B; since: No need of giving weights to see all the mischief that could come from giving the

RE: [EM] Saari's Basic Argument

2003-01-17 Thread Forest Simmons
the radii of gyration. On Fri, 17 Jan 2003, Alex Small wrote: Forest Simmons said: On Thu, 16 Jan 2003, Steve Barney wrote: Forest: In your example, 66 ABC 34 BCA No need of giving weights to see all the mischief that could come from giving the win to B. Moreover

Re: [EM] Symmetry and Condorcet

2003-01-17 Thread Forest Simmons
On Thu, 16 Jan 2003, Alex Small wrote: Forest Simmons said: Could we consider this a canonical reduction of some type? Do you mean canonical transformation? You mentioned variational principles in another post, which are related to canonical transformations in Lagrangian and Hamiltonian

Re: [ESD] Single-seat cumulative voting options

2003-01-17 Thread Forest Simmons
On Thu, 16 Jan 2003, Tom Ruen wrote: I judge that Bucklin has pretty much the same strengths and weaknesses as MCA. Ranking versus Rating is the difference. The option of allowing equal rankings is nice, although not clear that it is in the best interest of anyone to do so. Bucklin might

Re: [ESD] Single-seat cumulative voting options

2003-01-17 Thread Forest Simmons
On Fri, 17 Jan 2003, Forest Simmons wrote: ... In fact, suppose that your favorite candidate is A, and that there are two front runners B and C, of which your preferred is B, so that your sincere preferences (restricted to these three candidates) look like ABC. What would be the worst

RE: [EM] Saari's Basic Argument

2003-01-17 Thread Forest Simmons
On Fri, 17 Jan 2003, Alex Small wrote: Forest Simmons said: 66 ABC 34 BCA No need of giving weights to see all the mischief that could come from giving the win to B. Moreover, if candidate C weren't there then we'd all agree that A trounced B conclusively. Then we throw in C

RE: [EM] Saari's Basic Argument

2003-01-16 Thread Forest Simmons
On Thu, 16 Jan 2003, Steve Barney wrote: Forest: Isn't that just another way of saying Kemeny's Rule does not respect cyclic symmetry? Or we could say that cyclic symmetry doesn't respect the minimal distance criterion, since that is what Kemeny's rule is. A more neutral statement is that

Re: [EM] Symmetry and Condorcet

2003-01-16 Thread Forest Simmons
On Thu, 16 Jan 2003, Alex Small wrote: Anyway, after exploring what happens when we require election methods to respect symmetry, I'm forced to conclude that symmetry isn't a very useful criterion. When stabbing around in the dark you can use symmetry as a guide for where to start

RE: [EM] Saari's Basic Argument

2003-01-16 Thread Forest Simmons
On Thu, 16 Jan 2003, Forest Simmons wrote: On Thu, 16 Jan 2003, Steve Barney wrote: Forest: Isn't that just another way of saying Kemeny's Rule does not respect cyclic symmetry? Or we could say that cyclic symmetry doesn't respect the minimal distance criterion, since that is what

Re: [EM] 1-Person-1-Vote has been abandoned.

2003-01-15 Thread Forest Simmons
I cannot do better, but here is a consideration: Suppose each voter is to mark one candidate and write down one number in the space provided on the ballot, and that the winner of the election is the candidate marked on the ballot that has the largest number in the space provided. Does this

Re: [EM] Saari's Basic Argument

2003-01-15 Thread Forest Simmons
I've already given an example in which Borda gives the wrong answer after the symmetry is removed. Now you have given an example in which symmetry removal shows the CW to be wrong. So that evens the score :-) In other words, neither Borda nor Condorcet can claim to be superior on the basis of

Re: [EM] 1-Person-1-Vote has been abandoned.

2003-01-15 Thread Forest Simmons
One could limit the space to so many ASCII symbols, so the person most ingenious at describing large numbers would choose the winner. Say there are ten symbols allowed, which would be larger 9! or 9^9^9^9^9! ? If there were enough symbols to write out the phrase The sum of all the

Re: [EM] 1-Person-1-Vote has been abandoned.

2003-01-15 Thread Forest Simmons
Actually, Cantor proved that there are infinitely many distinct infinities on the same day he proved that the cardinality of the reals is greater than the cardinality of the rationals. Here's the proof in modern notation: Let X be any set (finite or infinite, it doesn't matter). Let P(X) be the

Re: [EM] Saari's Basic Argument

2003-01-15 Thread Forest Simmons
On Wed, 15 Jan 2003, Alex Small wrote: I'm not convinced that symmetry is a particularly compelling reason to pick an election method, especially not the symmetry of {ABC,BCA,CAB}, which has a rotational bias. True, it favors no candidate, but it does favor its three orders over

Re: [EM] The voter median candidate generalized to multidimensionalissue space

2003-01-14 Thread Forest Simmons
rigidly into a three dimensional coordinate system: ABC -- [1,0,-1] ACB -- [1,-1,0] CAB -- [0,-1,1] CBA -- [-1,0,1] BCA -- [-1,0,1] BAC -- [0,1,-1] Forest On Mon, 13 Jan 2003, Forest Simmons wrote: A simple example illustrates the Achilles heel of the VMO (Voter Median Order). 3 ABC 2 BCA

Re: [EM] Saari's Basic Argument

2003-01-14 Thread Forest Simmons
In EM archives message #8999 Alex recounts in his own words Saari's idea of subtracting out the symmetrical part of a ballot pattern and then deciding the winner on the basis of the residual ballots. Let's do an example: 7 ABC, 5 ACB , 9 CAB, 3 CBA, 7 BCA, 8 BAC. If we subtract three of each

Re: [EM] The voter median candidate generalized to multidimensionalissue spaces.

2003-01-13 Thread Forest Simmons
greater than unity, but with only a few of degrees of freedom to be shared between the numerator and denominator, we cannot have much confidence in this conclusion. Note that the top VMO candidate is also the IRV winner. That's not too comforting. Forest On Fri, 10 Jan 2003, Forest Simmons wrote

Re: Re: [EM] The voter median candidate generalized to multidimensionalissue spaces.

2003-01-10 Thread Forest Simmons
the winning order is BAC, in this case the same as as the Borda order, rather than the Ranked Pairs order of ABC. Forest On Wed, 8 Jan 2003, Forest Simmons wrote: Suppose that (in a certain election) candidate X is preferred over any other candidate Y on any issue Z by some

Re: [EM] The voter median candidate generalized to multidimensionalissue spaces. (fwd)

2003-01-10 Thread Forest Simmons
far, the VMO order agrees with Black. Is there an example with three candidates in which Black does not yield the VMO? -- Forwarded message -- Date: Thu, 9 Jan 2003 19:23:41 -0800 (PST) From: Rob LeGrand [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: Forest Simmons [EMAIL

Re: [EM] The voter median candidate generalized to multidimensionalissue spaces. (fwd)

2003-01-10 Thread Forest Simmons
the shape of the distribution of voters in Voter Space, which presumably reflects the distribution of voters in issue space. It remains to be seen if there is a three candidate example in which Black does not agree with the VMO. Forest On Fri, 10 Jan 2003, Forest Simmons wrote: Rob LeGrand

Re: [EM] The voter median candidate generalized to multidimensionalissue spaces.

2003-01-09 Thread Forest Simmons
is called the Footrule aggregation of the voter rankings of the candidates. It is now easy to see why this Footrule order is suboptimal; the old coordinate axes represent variables that are correlated in varying degrees. Forest On Wed, 8 Jan 2003, Forest Simmons wrote: Suppose

Re: [EM] The voter median candidate generalized to multidimensionalissue spaces.

2003-01-09 Thread Forest Simmons
On Wed, 8 Jan 2003, Forest Simmons wrote: Suppose that (in a certain election) candidate X is preferred over any other candidate Y on any issue Z by some majority (depending on Y and Z). Such a candidate would seem like a logical choice for winner of the election, if there were such a candidate

[EM] The voter median candidate generalized to multidimensional issuespaces.

2003-01-08 Thread Forest Simmons
Suppose that (in a certain election) candidate X is preferred over any other candidate Y on any issue Z by some majority (depending on Y and Z). Such a candidate would seem like a logical choice for winner of the election, if there were such a candidate. How could we locate such a candidate if

Re: [EM] Advanced Math question

2003-01-07 Thread Forest Simmons
(if not differential game theory). [Differential Game theory would be ideal for the continuous (joy stick) version of the CRAB race method.] Forest On Thu, 2 Jan 2003, Dave Ketchum wrote: On Tue, 31 Dec 2002 17:46:56 -0800 (PST) Forest Simmons wrote: Linear algebra, graph theory, probability

Re: [EM] My Matrix for Kemeny's Rule, n=3

2003-01-02 Thread Forest Simmons
://electionmethods.org/? SB --- In [EMAIL PROTECTED], Forest Simmons [EMAIL PROTECTED] wrote: Your example is correctly done. Despite the intractability of the method for large numbers of candidates, it seems like an ideal method for some situations. One application could be in choosing between

Re: [EM] Kemeny's Rule/Condorcet's Method

2002-12-31 Thread Forest Simmons
Adam's response is precisely correct and well written. I would add only this: Determining the Kemeny order from ranked preference ballots suffers the combinatorial explosion because there is no way of getting around one by one testing of most of the N! permutations of candidates in order to see

Re: [EM] My Matrix for Kemeny's Rule, n=3

2002-12-31 Thread Forest Simmons
Your example is correctly done. Despite the intractability of the method for large numbers of candidates, it seems like an ideal method for some situations. One application could be in choosing between several orders that have been found by other means. [The main computational difficulty of

Re: [EM] The wonders of filters and delete keys

2002-12-31 Thread Forest Simmons
On Fri, 27 Dec 2002, Alex Small wrote: snip Another point is that Approval is a very BAD idea for the primary. Say that we're narrowing it down to 4 candidates. The largest faction could all approve their favorite and the 3 Stooges. The second stage would likely include those 4

Re: [EM] Need IRV examples; voting show

2002-12-31 Thread Forest Simmons
Somewhere up this thread Blake Cretney brought up the idea that some Condorcet methods may satisfy a certain modified consistency criterion. If the method gives a complete ranking as output, and if two subsets of ballots produce the same ranking, then the output based on the union of the two

Re: [EM] Cumulative Approval (Not CRAB) [Was: CR vs Condorcet]

2002-12-31 Thread Forest Simmons
This sounds like a good idea to me for situations in which it is not too inconvenient to do an actual two stage process. As Alex said in his filter posting, if we're going to go to all the trouble of having primaries, why not do them right? Using two stage cumulative approval we could say that

Re: [EM] Correction. Big CS fault?

2002-12-27 Thread Forest Simmons
On Wed, 18 Dec 2002, Forest Simmons wrote: By the way, it turns out that in the three candidate case, if the preference ballots are generated in this way, regardless of the metric used in step 2, a CW is assured; there can be no cycle. So somewhere in this 5 step process the cyclical

Re: List Expulsion Poll

2002-12-26 Thread Forest Simmons
Don might be happy to be expelled; then he can claim that his barbs were so sharp that the EM list members couldn't cope with them, so they banned him. It might give the EM list a reputation for closed mindedness. Even undeserved reputations can be bad PR. Forest For more information about

Re: [EM] Candidate-Space Method

2002-12-26 Thread Forest Simmons
A brief progress report: Let the entry in the ith row and jth column of a matrix be a zero or a one depending on whether or not the ith voter approves of the jth candidate. Call this matrix A. The rows of this matrix represent the approval ballots of the voters, so we could call the row space

Re: [EM] Kemeny's Rules = Condorcet's Method

2002-12-18 Thread Forest Simmons
As I understand it, Kemeny's Rule amounts to minimizing a certain metric on rankings, and that this minimization is an NP complete problem, making it intractable for elections with more than four or five voters when there are as few as twenty candidates. Forest On Wed, 18 Dec 2002, barnes99

Re: [EM] Correction. Big CS fault?

2002-12-18 Thread Forest Simmons
I took it for granted that favorite would also be among the approved on Majority Choice ballots, and that favorites would be determined from the rankings or ratings in the case of CR or ranked ballots. But I still think that CS as I proposed it suffers from a fault. If the race is perceived as

Re: [EM] Correction. Big CS fault?

2002-12-18 Thread Forest Simmons
Here's the version of Candidate Space (CS) that I like the best now: The ballots must have some way of determining favorite, so must have at least the expressivity of Majority Choice ballots. [The favorite on the expressive side of the ballot must have maximal positive instrumentality in the

Re: [EM] Optimal methods for multimember elections

2002-12-14 Thread Forest Simmons
On Fri, 13 Dec 2002, Alex Small wrote: Forest Simmons said: Each voter marks one candidate on the ballot. These candidates become proxies (for the voters that marked their names) in an Election Completion Convention. If there are n seats to be filled, and there is a subset of n

Re: [EM] CPW = CW in the 3 by 1 by 1 case.

2002-12-14 Thread Forest Simmons
Here's an heuristic argument showing why proxy approval is apt to pick the CW when there is one, regardless of the dimension of the issue space. When there is a CW, rational approval players with perfect information will concede the win to the CW, because the CW is the one and only stable

Re: [EM] Optimal methods for multimember elections

2002-12-13 Thread Forest Simmons
I agree with Alex, if the at large method is not even semi-proportional, districts would be an improvement over the current situation. However a simpler and much better solution is to adopt some kind of PR or semi-PR method that uses the same ballot style and same ballot machinery. Among these

[EM] Another use for Majority Choice style ballots.

2002-12-13 Thread Forest Simmons
I've been thinking about Richard Moore's Majority Potential idea which is just Copeland with fictitious candidates distributed uniformly in issue space. The method was never intended for public proposal, rather it was intended as a standard to measure the Majority Potential of other methods.

Re: [EM] Another use for Majority Choice style ballots.

2002-12-13 Thread Forest Simmons
a ranked ballot for each voter, and find the Condorcet Winner, if there is one. This makes the method very easy to test in simulations comparing it with other methods. We need a name for the method. Any ideas? Forest On Fri, 13 Dec 2002, Forest Simmons wrote: I've been thinking about Richard

Re: [EM] CPW = CW in the 3 by 1 by 1 case.

2002-12-12 Thread Forest Simmons
) of the Election Completion Procedure votes]. Forest On Wed, 11 Dec 2002, Forest Simmons wrote: Candidate Proxy with 3 candidates, 1 seat to be filled, and a 1 dimensional issue space: The following conditions taken together are sufficient to ensure that the Candidate Proxy Winner and the Condorcet

[EM] CPW = CW in the 3 by 1 by 1 case.

2002-12-11 Thread Forest Simmons
Candidate Proxy with 3 candidates, 1 seat to be filled, and a 1 dimensional issue space: The following conditions taken together are sufficient to ensure that the Candidate Proxy Winner and the Condorcet Winner will be one and the same in a three candidate, single winner election. (1) The issue

Re: Candidate Proxy

2002-12-10 Thread Forest Simmons
Dear Steven, thanks for your insightful and thoughtful response. An explanation of my apparent dismissal of Approval in the context of that message is given below, along with some other related thoughts. Best Wishes, Forest On Sun, 8 Dec 2002, Steven J. Brams wrote: Dear Forest,

Re: Yes/No Voting

2002-12-09 Thread Forest Simmons
On Mon, 9 Dec 2002, Gervase Lam wrote: Each voter may give a candidate Yes, No, or nothing. A candidate's No votes are subtracted from his Yes votes, and the result is his score. The candidate with highest score wins. That's equivalent to CR, with -1, 0, 1. Which is equivalent to 0, 1, 2

Re: [EM] Quantifying manipulability

2002-12-05 Thread Forest Simmons
method? Does it depend on the number of candidates? If so, perhaps that should be factored into the formula. Forest On Wed, 4 Dec 2002, Alex Small wrote: Forest Simmons said: Let F(V,M) represent the set of voter ballots that are optimal for the voters with utility set V under method M

Re: [EM] Quantifying manipulability

2002-12-04 Thread Forest Simmons
Here are some preliminary considerations that come to mind in the course of trying to quantify manipulability. The kind of manipulability that is most crucial (in my opinion) has to do with the sensitivity of (near optimal) strategy to variations in information. To the degree a method is

Re: [EM] The Copeland/Borda wv hybrid (fwd)

2002-12-03 Thread Forest Simmons
I meant to make this information available to the whole EM list. -- Forwarded message -- Date: Tue, 3 Dec 2002 14:40:05 -0800 (PST) From: Forest Simmons [EMAIL PROTECTED] To: Elisabeth Varin/Stephane Rouillon [EMAIL PROTECTED] Subject: Re: [EM] The Copeland/Borda wv hybrid Rob

Re: [EM] Candidate Proxy Methods (fwd)

2002-12-03 Thread Forest Simmons
as the Election Completion Procedure. On Mon, 2 Dec 2002, Forest Simmons wrote: Here's a message that I forwarded to a friend of mine who is a prominent and influentual member of FAVOR (FairVoteORegon) the organization promoting IRV here in Oregon: -- Forwarded message -- Date: Mon, 2

[EM] Candidate Proxy Methods (fwd)

2002-12-02 Thread Forest Simmons
Here's a message that I forwarded to a friend of mine who is a prominent and influentual member of FAVOR (FairVoteORegon) the organization promoting IRV here in Oregon: -- Forwarded message -- Date: Mon, 2 Dec 2002 14:28:47 -0800 (PST) From: Forest Simmons [EMAIL PROTECTED

Re: [EM] CR vs. Condorcet

2002-11-29 Thread Forest Simmons
See below for my two cents worth. On Thu, 28 Nov 2002, Douglas Greene wrote: This is primarily directed to Mike, but I'd like to know why list members support Condorcet over cardinal rankings/range voting. BTW, I've posted Warren Smith's work on range voting to our Yahoo!Group. There are at

Re: [EM] More Condorcet Flavored PR examples

2002-11-20 Thread Forest Simmons
On Wed, 20 Nov 2002 [EMAIL PROTECTED] wrote: On 20 Nov 2002 at 14:11, Forest Simmons wrote: Suppose that a voter ranks six candidates as follows in a three seat multiwinner race: A1B1B2A2A3B3 . Which of the following two outcomes would this voter be most likely to prefer

RE: [EM] D'Hondt without lists

2002-11-19 Thread Forest Simmons
Ollie, thanks for your insights and examples. The main example below has led me to consider another, perhaps better, way of scoring the head-to-head PR methods that I have been working on lately. See below. Forest On Sun, 17 Nov 2002, Olli Salmi wrote in part: snip Cassel gives the

Re: [EM] More Condorcet Flavored PR examples

2002-11-15 Thread Forest Simmons
I'm coming around to the conclusion that reverse symmetry is not such a good idea in multiwinner elections if one's aim is proportional representation. Consider the following examples: Example 1: 25 ABC 25 BAC 25 CAB 25 CBA In this example if we reverse the preferences, we get the same number

[EM] More Condorcet Flavored PR examples

2002-11-13 Thread Forest Simmons
Scoring two candidate subsets relative to a ranked ballot can be organized into a tableau as follows: rank X1 X2 (X1-X2) Y1 Y2 - 100 0 00 201 -1 01 321 1 10 400 0 0

Re: [EM] Condorcet Flavored PR Methods

2002-11-12 Thread Forest Simmons
In this installment I would like to summarize (by example) the how to of the current Condorcet Flavored Proportional Representation (CFPR) method that takes into account the constructive criticism of Adam Tarr: Here's information from one typical ballot:

Re: [EM] Condorcet Flavored PR Methods

2002-11-08 Thread Forest Simmons
The integral (for x from 0 to 1) of (1-x^(n+.5))/(1-x) has the numerical value given by the finite sum -ln(4) + 1/.5 + 1/1.5 + 1/2.5 + ... + 1/(n+.5). Forest On Thu, 7 Nov 2002, Forest Simmons wrote: Now I'll try to tackle the second question: On Thu, 7 Nov 2002, Adam Tarr

Re: [EM] Condorcet Flavored PR Methods

2002-11-07 Thread Forest Simmons
Adam, thanks for your interest and comments. I'll try to answer your questions below. On Thu, 7 Nov 2002, Adam Tarr wrote: Forest, I finally got around to reading this series of posts. It's very interesting stuff and you've obviously made a lot of progress on this. A few comments: - I'd

Re: [EM] Condorcet Flavored PR Methods

2002-11-07 Thread Forest Simmons
Now I'll try to tackle the second question: On Thu, 7 Nov 2002, Adam Tarr wrote in part: - I will admit this is the first election method I've dealt with where I have trouble manipulating small examples. Here's a very small example that was giving me trouble: say we are electing two

Re: [EM] Condorcet Violates Strong FBC

2002-11-06 Thread Forest Simmons
Here's why I believe that no voting method based on ranked ballots can satisfy both the Favorite Betrayal Criterion and the Majority Criterion: Suppose that sincere preferences are given by x:ABC y:BCA z:CAB and that none of the three factions has a majority. Suppose (by way of contradiction)

Re: [EM] Condorcet Violates Strong FBC

2002-11-06 Thread Forest Simmons
Here's the instant version of CRAB: Voters submit ranked preference ballots. Suppose that there are N voters and K candidates. Initialize a one by K array C by letting the j_th entry be the number of first place votes of candidate j. Then ... While the maximum entry in C is less than N*K+1

Re: [EM] Relevance of Consistency

2002-11-06 Thread Forest Simmons
Some Condorcet devotees disparage the Consistency Criterion only because no Condorcet method can satisfy it. Others do not disparage it, but reluctantly let go of it for the same reason. But Condorcet (unlike IRV) methods are very close to the boundary of the set of methods that do satisfy the

Re: [EM] Condorcet Violates Strong FBC

2002-11-05 Thread Forest Simmons
Random ballot does satisfy strong FBC. I suspect that no majoritarian method absolutely satisfies strong FBC, though some methods like the instant version of CRAB (Cumulative Repeated Approval Balloting) satisfy it for all practical purposes. I'll write more when my Internet Service Provider

Re: [EM] Strong FBC Can Be Satisfied By Ranked Methods! (sort of)

2002-10-31 Thread Forest Simmons
Alex, it seems to me that if only the first two ranks get points, then in a close race among several candidates if your favorite isn't among the top three contenders with near equal chances, you may want to give the top to slots on your ballot to your preferred among the top three contenders. To

Re: [EM] Condorcet and the Muller-Satterthwaite Theorem

2002-10-22 Thread Forest Simmons
Good question. I wonder if Pareto Efficient means the same as satisfying the Pareto Condition that we are all familiar with and that you use in your proof sketch. I know that the name Pareto is associated with various related but distinct concepts in game theory because the referee of a paper

Re: CR Arrow

2002-10-21 Thread Forest Simmons
On Sun, 20 Oct 2002, Alex Small wrote: MIKE OSSIPOFF said: Of course that depends on how one defines IIAC. By the simple way that I define it, Approval CR comply. But people have told me that they believe that IIAC means something other than what I say it means. But no one who has

Re: [EM] Condorcet Flavored PR Methods

2002-10-03 Thread Forest Simmons
On Mon, 30 Sep 2002 [EMAIL PROTECTED] wrote: On 28 Sep 2002 at 16:17, Markus Schulze wrote: Dear Forest, you wrote (27 Sep 2002): A Condorcet Flavored PR Method is an M-winner election method that (1) compares candidate subsets of cardinality M head-to-head, and (2) does the

Re: [EM] Avoiding Clone Problems in Condorcet Flavored PR methods

2002-09-27 Thread Forest Simmons
When approval cutoff's are supplied (as they really should be, since approval information is relatively cheap) there are several ways to resolve the difficulty, and your way certainly gives the right answers to the examples below. I have some other ideas (along these lines) that I will post to

[EM] Avoiding Clone Problems in Condorcet Flavored PR methods

2002-09-24 Thread Forest Simmons
Suppose there are to be two winners in a PR election among several candidates C1, C2, C3, C4, C5, ..., and in comparing subset {C1,C2} with subset {C2, C3} the ballots show 170 C1C2C3 170 C1C3C2 330 C2C3C1 330 C3C2C1 . Which of these two subsets provides better proportional representation?

Re: [EM] Alphabetical ballot

2002-09-20 Thread Forest Simmons
On Fri, 20 Sep 2002, Elisabeth Varin/Stephane Rouillon wrote in part: First why remove I and O if the ballots is presented like that? I do not think there can be confusion... I agree. Next, I doubt we really need + and - signs because there is rarelly 26 candidates or more, but in case it

Re: Confirmed!: Condorcet efficiency of IRV 2-stage runoff

2002-09-20 Thread Forest Simmons
On Fri, 20 Sep 2002, Rob LeGrand wrote: Steve asked: Can you provide me with some examples where the IRV method elects the Condorcet Candidate, but the 2-Stage Runoff does not? Here's one: 40:ACDB 25:BCDA 20:CDBA 15:DCBA Plurality picks A, top-two runoff picks B and IRV picks C,

RE: [EM]

2002-09-18 Thread Forest Simmons
On Wed, 18 Sep 2002, Narins, Josh wrote: Joe, this statement is not rigorous. Four levels are surely enough to distinguish substantially distinct degrees of active approval. From something I read back in college, 7 levels (much above, above, slightly above, average, slightly below,

Re: [EM] Truncation

2002-09-18 Thread Forest Simmons
On Wed, 18 Sep 2002, Dave Ketchum wrote in part: [Adam wrote] At first I didn't like this idea, but its grown on me. The simplicity to the voter of ABCD(E)F voting is worth it. The voters who are interested and involved enough to actually need six distinct levels of approval are the

Re: [EM] Dual Dropping method and Preference Approval ballot ideas

2002-09-11 Thread Forest Simmons
On Tue, 10 Sep 2002 [EMAIL PROTECTED] wrote in part: also, but not as a tie-breaker. Instead, I think that the approval cut-off should be used to complete the ballot by placing the unvoted candidates between the approved and unapproved candidates. Although this is imperfect, it seems to

RE: [EM] D'Hondt without lists

2002-08-17 Thread Forest Simmons
Try the following web page groups.yahoo.com/group/election-methods-list/messages and then type PAV into the search box. On Sat, 17 Aug 2002, James Gilmour wrote: Forest Simmons wrote (in part) Ordinary (i.e. non-sequential PAV) is a little harder to describe, but it is easy to find

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