[EM] CLDMMPO

2012-01-10 Thread fsimmons
Mike, Here's why I think that the CLD part is not necessary when we limit MMPO to three slots: The most likely situation where the CL wins is the case in which there is a clone cycle of three candidates that generate a lot of opposition among themselves, more opposition than any of them

[EM] CLDMM{O

2012-01-09 Thread fsimmons
Mike, I wonder if it is possible for a CL to win three slot MMPO when the number of ballots on which X appears in the bottom slot is counted as an oppsitions to X. In other words, I wonder if the CL disqualification is redudant in that context. Also, how does the CLD rule affect the FBC in

Re: [EM] Kristofer: MMPO objections

2012-01-05 Thread fsimmons
Kristopher, I agree that Plurality failure is bad in a public proposal and hard to defend in any case. In the case of MMPO the question is moot because Plurality failure is so easily fixed by either of the following natural tweaks: 1. Put 50 percent in each of the diagonal positions. (A

[EM] Three Slot Voting Equipment

2012-01-03 Thread fsimmons
That's very interesting, Mike. I didn't know that three slot voting equipment was already in place; I never knew how exactly they handled ballot iniatives. All the more reason to narrow down to the best three slot methods! Election-Methods mailing list - see http://electorama.com/em for

[EM] MAMD (Max Assent Min Dissent)

2012-01-02 Thread fsimmons
Date: Mon, 2 Jan 2012 19:44:48 + From: MIKE OSSIPOFF To: Subject: [EM] Forest: MAMD Forest-- MMPO has several big advantages: 1. The unmatched brevity of its definition 2. Its full-rankings flexibility, which allows the full sincere- expressivity benefit of AERLO 3. Its ability

Re: [EM] MAMD (Max Assent Min Dissent)

2012-01-02 Thread fsimmons
Mike wrote .. MMPO with symmetric completion at bottom, while avoiding Kevin's bad-example, also sometimes loses MMPO's ABE-success: 60: AB 55: B 100: C Forest replied Here is the pairwise opposition matrix for MAMD: [[155, 110, 87.5], [105, 100, 115], [127.5, 100, 115]] .

[EM] MMPO objections

2011-12-31 Thread fsimmons
The ordinary MMPO pairwise opposition matrix has blanks down the main diagonal. If you put the respective disapprovals in those positions, then the Plurality problem goes away. Filling in the diagonal elements with disapprovals is tantamount to incorporating a virtual Minimum Acceptable

[EM] ACF grade voting

2011-12-30 Thread fsimmons
Suppose the ballot limits grade options to A, C, and F, but a sizeable faction would like to award a grade of B to a particular candidate. If half of them voted a grade of A and the other half a grde of C, the resulting grade points would be the same. So in elections with large electorates

[EM] Proportional Range Voting via Honest Approval PAV

2011-12-25 Thread fsimmons
Now that we have a good definition of honest approval strategy, we can automatically adapt methods (like PAV) that are based on approval style ballots to cardinal ratings style ballots. Definition: Honest Approval Strategy: Approve your k top ranked candidates, where k is the sum of your

[EM] SODA, negotiation, and weak CWs (Jameson Quinn)

2011-12-25 Thread fsimmons
Jameson, could you please submit this again in a plain text format that doesn't put in extra form feeds? Election-Methods mailing list - see http://electorama.com/em for list info

[EM] Approval Strategy

2011-12-25 Thread fsimmons
Mike wrote As for myself, in Score-Voting, I'd probably use non-extreme points assignments only in two instances: 1. The excellent diplomatic ABE solution that you suggested for Score-Voting Forest replied Excellent except that satisfaction of the FBC is in doubt. I assumed

Re: [EM] Fwd: SODA, negotiation, and weak CWs

2011-12-25 Thread fsimmons
Jameson asked for thoughts. My first thought is that this kind of analysis is exactly what we need. My second thought is that so far SODA has held up well under all the probes for weakness that anybody has come up with. SODA seems to be a very robust method. My third thought is that I have

[EM] Proportional Range Voting via Honest Approval PAV

2011-12-25 Thread fsimmons
While writing the below it occurred to me that we could construct another Proportional Representation method based on ordinal ballots (ranked preferences) by the following technique: (1) Convert the ordinal rankings into cardinal ratings via the monotonic, clone free techinque that I outlined

[EM] Approval Strategy

2011-12-24 Thread fsimmons
From: MIKE OSSIPOFF To: Subject: [EM] Approval strategy Message-ID: Content-Type: text/plain; charset=iso-8859-1 Forest-- You wrote: Also, going back to what you metioned before about the value of showing support for losers that you like better than the winner (given they

[EM] Better Than Expectation Approval Voting

2011-12-23 Thread fsimmons
Mike's exposition of basic Approval and Range strategy as variations on the theme of Better Than Expectation strategy was very interesting and valuable, including the recommendation of introducintg Approval after score or grade voting, which are much more familiar to most people. That was

[EM] Better Than Expectation Approval Voting (2nd try readable format)

2011-12-23 Thread fsimmons
Mike's exposition of basic Approval and Range strategy as variations on the theme of Better Than Expectation strategy was very interesting and valuable, including the recommendation of introducintg Approval after score or grade voting, which are much more familiar to most people. That was

[EM] FairVote in _Science_ magazine (MIKE OSSIPOFF)

2011-12-21 Thread fsimmons
Mike, Right ON! But I tripped up for a second on an unintentional typo concerning Richie's second claim... 2. The article said that the best strategy in Approval is to rank the candidates sincerely. Replace Approval with IRV in the above statement: Forest From: MIKE OSSIPOFF To:

Re: [EM] Least Expected Umbrage, a new lottery method

2011-12-21 Thread fsimmons
Jobst, Yes, your Condorcet Lottery was the first of this kind, as I pointed out on the EM list when the Rivest paper first came to our attention. Suppose that we replace each entry in the margins matrix with its sign (-1, 0, or 1 depending on whether it is negative zero or positive). we

Re: [EM] FairVote in _Science_ magazine (MIKE OSSIPOFF)

2011-12-21 Thread fsimmons
So basically Richie was stubbornly repeating his lies, but we cannot fault Science for propagating them. - Original Message - From: Jameson Quinn I believe the only time FairVote has been published in Science was as a response to an editorial by Steven Brams. Brams also got a

[EM] Least Expected Umbrage, a new lottery method

2011-12-18 Thread fsimmons
Let M be the matrix whose row i column j element M(i,j) is the number of ballots on which i is ranked strictly above j plus half the number of ballots on which neither i nor j is ranked. In particular, for each k the diagonal element M(k , k) is half the number of ballots on which candidate k

[EM] SODA strategy

2011-12-15 Thread fsimmons
If voters think that SODA is complex, then it's because they have been exposed unnecessarily or prematurely to the niceties of strategy considerations. Let's take a lesson from IRV supporters. They don't get anybody worried about IRV's monotonicity failure or FBC failure by bringing them up

[EM] FBC failure for acquiescing coalition methods

2011-12-15 Thread fsimmons
Mike, I think your example applies to all acquiescing coalition methods that we have considered. The failure is caused by someone leap frogging over others to get to the top position. But I think that most of these methods satisfy this FBC like property: If the winner changes when (on some

Re: [EM] SODA might be the method we've been looking for.

2011-12-14 Thread fsimmons
Like Andy I prefer SODA as well, especially for a deterministic method. In some settings I prefer certain stochastic methods to deterministic methods. But my curiosity impels me to see what can be done while ignoring or putting aside the advantages of both chance and delegation.

Re: [EM] Forest: MAMT

2011-12-14 Thread fsimmons
Chris and Mike, I think I finally have the right version which I will call MSAC for Majority Support Acquiescing Coalitions: Definitions: A coalition is a subset of the candidates. A ballot acquiesces to a coalition of candidates iff it rates no candidate outside the coalition higher than

Re: [EM] This might be the method we've been looking for:

2011-12-12 Thread fsimmons
Thanks for checking the details. In traditional game theory the rational stratetgies are based on the assumption of perfect knowledge, so the A faction would know if the B faction was lying about its real preferences. Even knowing that the other faction knew that they were lying they could

Re: [EM] Mike: variations on Kevin's ABE and LRV

2011-12-12 Thread fsimmons
Mike asked ... You can reach the person managing the list at Forest? Could LRV, due to the bottom symmetrical completion, sometimes have an ABE-like problem, if the numbers were somewhat differentfrom those of the usual ABE? Could it have a co- operation/defection problem for

[EM] Mike Ossipoff: LRV properties

2011-12-11 Thread fsimmons
Mike, LRV is just another equivalent way of describing MMMPO. The are just MMPO with symmetric completion at the bottom level but not at the top. In addition to FBC it satisfies MAP, KMBE, and U, but not LNHe. MAP means Mono-Add-Plump KMBE means Kevin's MMPO bad-example LNHe means

[EM] MAM evaluation. Summary of FBC/ABE methods.

2011-12-10 Thread fsimmons
Date: Sat, 10 Dec 2011 18:44:15 + From: MIKE OSSIPOFF To: Subject: [EM] MAM evaluation. Summary of FBC/ABE methods. Message-ID: Content-Type: text/plain; charset=iso-8859-1 Evaluation of MAM: Forest-- I've been looking at various ways of doing Mutual Acquiescing

Re: [EM] MMPO and Symmetric Completion

2011-12-09 Thread fsimmons
Jameson, good idea and valuable comments. However, I'm not sure that regret is the right word. I regret something after I make a bad choice. I resent something when I make a good choice that is over-ridden by somebody with the power to do so. I suggest Least Resentment Voting, LRV. Forest

Re: [EM] Acquiescing majority MMT (MIKE OSSIPOFF)

2011-12-09 Thread fsimmons
Mike, yes it is the same as the one you repeated at the end of your reply below. But notice that in the ballot set 49 C 27 AB 24 B there are two Acquiescing Majorities, namely both {A, B} and {B, C}, and that C has more top votes than B. Forest From: MIKE OSSIPOFF To: Subject: [EM]

[EM] Least Resentment Voting (LRV) in the context of Approval

2011-12-09 Thread fsimmons
If I remember correctly Kevin Venzke's first post to this list was a geometric argument that the MMPO winner was apt to be closer to the voter median position in Approval than the Approval winner. The scenario he had in mind was something like this Scenario One: 26 A 24 A=C 24 B=C 26 B The

Re: [EM] MMT

2011-12-08 Thread fsimmons
Mike, what about a version of MMT that we could call MAMT: Define a Mutual Acquiescing Majority set S as a set of candidates that are acquiesced to on a majority of ballots, i.e. for each ballot of the given majority set of ballots, no candidate outside the set S is ranked or rated above any

[EM] MMPO and Symmetric Completion

2011-12-08 Thread fsimmons
MinMax Pairwise Opposition satisfies the FBC but not the Condorcet Criterion. MinMax(margins) satisfies the Condorcet Criterion, but not the FBC. MMPO combined with symmetric completion of all equal rankings and truncations is exactly equivalent to MinMax(margins), so symmetric completion of

Re: [EM] Forest's FBC/ABC method

2011-12-06 Thread fsimmons
Here's an equivalent but simpler description of the FBC/ABE compliant method that I have been calling (since Mike's pointer about MaxMin vs. MinMax) MaxMin(EqualRankPairwiseRule): Let M be a matrix whose entry in row i and column j is the number of ballots on which candidate i is rated or

[EM] Chris: Forest's FBC/ABC method (MIKE OSSIPOFF)

2011-12-05 Thread fsimmons
Mike is right; it should be called MaxMin instead of MinMax. From: MIKE OSSIPOFF To: Subject: [EM] Chris: Forest's FBC/ABC method Message-ID: Content-Type: text/plain; charset=iso-8859-1 Chris-- I'll describe Forest's proposal briefly: It's minmax margins (but it's defined as

Re: [EM] This might be the method we've been looking for:

2011-12-03 Thread fsimmons
Chris, you're right that it is very close to MinMax(margins). Let's compare and contrast: In both MinMax versions a matrix M is used to determine the winner in the same way: if the least number in row i is greater than the least number in any other row of the matrix M, then candidate i is

[EM] This might be the method we've been looking for:

2011-12-02 Thread fsimmons
Here’s a method that seems to have the important properties that we have been worrying about lately: (1) For each ballot beta, construct two matrices M1 and M2: In row X and column Y of matrix M1, enter a one if ballot beta rates X above Y or if beta gives a top rating to X.

Re: [EM] MMPO tiebreakers that don't violate FBC.

2011-11-26 Thread fsimmons
Mike, I like MMPO2 because (unlike MMPO1) it takes into account opposition from supporters of eliminated candidates, so is more broad based, and it is easily seen to satisfy the FBC. Also it allows more brad based support than MMPO3 where only the support by top raters is considered in the tie

[EM] MMPO ideas

2011-11-26 Thread fsimmons
There are several ideas that can be used to make variations on MMPO. 1. One is to use a bottom Tier Pairwise rule that counts bottom level candidates on a ballot as being opposed by all other bottom level candidates (analogous to the TTP rule in other methods). Note that this rule doesn't get

[EM] Does High Resolution Range offer a solution to the ABE?

2011-11-26 Thread fsimmons
While working with MinMaxCardinalRatingsPairwiseOpposition (MMcrwPO) I got an idea that high resolution Range might have an acceptable solutin to the defection problem that we have been considering: Sincere ballots 49 C x: AB y: BA where x appears to be slightly larger than y in the polls. The

[EM] MMCWPO (minimize maximum cardinal weighted pairwise opposition) satisfies the FBC and solves the ABE problem.

2011-11-23 Thread fsimmons
MMCWPO is the method that elects the candidate whose maximal weighted pairwise opposition is minimal. It solves the ABE problem as well as the FBC. I'm being shut down on this computer. More after T day. Forest Election-Methods mailing list - see http://electorama.com/em for list info

[EM] TTPD,TR (an FBC complying ABE solution?)

2011-11-21 Thread fsimmons
Chris, your new method includes the statement ... If any candidate X TTP beats any candidate Y, is not in turn TTP beaten by Y and is not TTP beaten by any candidate Z that doesn't also TTP beat Y, then Y is disqualified. In other words, there is no short TTP beatpath from Y to X,

[EM] An ABE solution

2011-11-19 Thread fsimmons
Mike, thanks for your comments. I'll respond in line below. From: MIKE OSSIPOFF Hi Forest-- Thanks for answering my question about MTA vs MCA. Your argument on that question is convincing, and answers my question about the strategy difference between those two methods. Certainly,

[EM] An ABE solution.

2011-11-17 Thread fsimmons
Here’s my current favorite deterministic proposal: Ballots are Range Style, say three slot for simplicity. When the ballots are collected, the pairwise win/loss/tie relations are determined among the candidates. The covering relations are also determined. Candidate X covers candidate Y if X

[EM] Descending Acquiescing Coalitions versus Nested Acquiescing Coalitions

2011-11-09 Thread fsimmons
DAC (descending acquiescing coalitions) disappointed Woodall because of the following example: 03: D 14: A 34: AB 36: CB 13: C The MDT winner is C, but DAC elects B. DAC elects B even though the set {B} has a DAC score of zero, because the descending order of scores includes both the

Re: [EM] Enhanced DMC

2011-10-06 Thread fsimmons
Chris, It could happen that the lowest approval candidate X that covers all higher approved candidates is covered by an even lower candidate Y that beats all higher approved candidates but doesn't cover them all. In that case X, even though X is the Covering DMC winner, some candidate with less

Re: [EM] Dodgson and Kemeny done right?

2011-09-16 Thread fsimmons
You're right, I forgot that Kemeny only needed the pairwise matrix. And according to Warren Dodgson is summable. I don't see how. - Original Message - From: Kristofer Munsterhjelm Date: Thursday, September 15, 2011 12:14 pm Subject: Re: [EM] Dodgson and Kemeny done right? To:

Re: [EM] Dodgson and Kemeny done right?

2011-09-15 Thread fsimmons
Borda done right is detailed here: http://lists.electorama.com/pipermail/election-methods-electorama.com/2011-July/028043.html Dodgson done right was sketched here: http://lists.electorama.com/pipermail/election-methods-electorama.com/2011-July/027888.html The version of Dodgson I was

[EM] Kemeny challenge

2011-09-13 Thread fsimmons
The problems with Kemeny are the same as the problems with Dodgson: (1) computational intractability (2) clone dependence (3) they require completely ordered ballots (no truncations or equal ranking), so they do not readily adapt to Approval ballots, for example. In my posting several weeks

Re: [EM] Enhanced DMC

2011-09-11 Thread fsimmons
Very good Chris. I tried to build a believable profile of ballots that would yield the approval order and defeats of this example without success, but I am sure that it is not impossible. I think in general that if the approval scores are at all valid I would go for the enhanced DMC winner

Re: [EM] Sincere Zero Info Range

2011-09-03 Thread fsimmons
One afterthought: Of all the cardinal ratings methods for vvarious values of p, the only one that satisfies the Favorite Betrayal Criterion (FBC) is the case of p=infinity, i.e. where the max absolute rating is limited, or equivalently, the scores are limited to some finite range, i.e. the

[EM] Sincere Zero Info Range

2011-09-02 Thread fsimmons
Range voting is cardinal ratings with certain constraints on the possible ratings, namely that they have to fall within a certain interval or range of values, and usually limited to whole number values. Ignoring the whole number requirement, we could specify a constraint for an equivalent

Re: [EM] the meaning of a vote (or lack thereof)

2011-08-28 Thread fsimmons
An example, due to Samuel Merrill (of Brams, Fishburn, and Merrill fame), simply normalizes the scores on each range ballot the same way that we convert a garden variety normal random variable into a standard one: i.e. on each ballot subtract the mean (of scores on that ballot) and

Re: [EM] the meaning of a vote (or lack thereof)

2011-08-26 Thread fsimmons
After Kevin's and Kristopher's comments, which I agree with, I am hesitant to beat a dead horse, but I have two more things for the record that should not be overlooked: First, just as there are deterministic voting methods that elicit sincere ordinal ballots under zero information

Re: [EM] the meaning of a vote (or lack thereof)

2011-08-24 Thread fsimmons
Here's a link to Jobst's definitive posting on individual and social utility: http://lists.electorama.com/htdig.cgi/election-methods-electorama.com/2007-February/019631.html Also, I would like to make another comment in support of Warren's thesis that cardinal range scores are as meaningful or

Re: [EM] the meaning of a vote (or lack thereof)

2011-08-23 Thread fsimmons
It seems to me that Arrow must want a unique generic meaning that people can relate to independent of the voting system. Perhaps he is right that ordinal information fits that criterion slightly better than cardinal information, but as Warren says, what really matters is the operational

[EM] Voting Reform Statement

2011-08-15 Thread fsimmons
The study of voting systems has made significant progress over the last decade, and our understanding is even farther beyond what it was 20 years ago. One important place where that has happened is on the election methods mailing list. This mailing list is likely to include the largest

Re: [EM] Enhanced DMC

2011-08-15 Thread fsimmons
- Original Message - From: Date: Friday, August 12, 2011 3:12 pm Subject: Enhanced DMC To: election-methods@lists.electorama.com, From: C.Benham To: election-methods-electorama@electorama.com Subject: [EM] Enhanced DMC Forest, The D in DMC used to stand for *Definite*.

[EM] Enhanced DMC

2011-08-12 Thread fsimmons
From: C.Benham To: election-methods-electorama@electorama.com Subject: [EM] Enhanced DMC Forest, The D in DMC used to stand for *Definite*. Yeah, that's what we finally settled on. I like (and I think I'm happy to endorse) this Condorcet method idea, and consider it to be

[EM] A variant of DSC

2011-08-12 Thread fsimmons
Thanks for the thorough analysis, Chris. It seems to me that the crux of the matter is the same as the open vs. closed primaries dilemma. If you vote sincerely in a closed primary, you may be supporting a candidate that will not be competitive in the larger competition. On the other hand an

Re: [EM] A variant of DSC

2011-08-09 Thread fsimmons
Last night I realized that my example below shows that my variant of DSC fails later-no-harm. Here's an example that illustrates the difference in Woodall's DSC and my modified version: 25 A1A2 35 A2A1 20 BA1 20 CA1 In my modification of DSC A1 wins. If the A2 faction truncates A1,

[EM] Another method based ratings of zero to three.

2011-08-09 Thread fsimmons
I know that Kevin is using four levels (zero through three) to test various methods, so here's an idea: 1. Find the number of votes at each level for each candidate. 2. If any candidates have scores of one on more than fifty percent of the ballots, convert the surplus ones to twos. 3 If the

[EM] What kind of monotonicity whould we exspect from a PR method?

2011-08-08 Thread fsimmons
It seems that if a PR method chose slate {X, Y} for a two winner election, and only X or Y received increased support in the rankings or ratings, then {X, Y} should still be chosen by the method. But consider the following approval profile (for a two winner election): 3 X 1 XY 2 Y 2 Z It

Re: [EM] : Chicken problem (was: SODA and the Condorcet

2011-08-07 Thread fsimmons
To sum up my point of view suppose that the candidates publicly announce the respective preferences (with levels of support shown): 48 A 27 CB 25 B We cannot tell from these ballots alone if B is bluffing or if B really despises A and C equally. If the decision is made only on the basis of

Re: [EM] A variant of DSC

2011-08-07 Thread fsimmons
That Q in the previous subject heading was a typo. Here's an example that illustrates the difference in Woodall's DSC and my modified version: 25 A1A2 35 A2A1 20 BA1 20 CA1 Woodall's DSC assigns 60 points to {A1, A2} and then the only other positive point coalitions that have non-empty

[EM] : Chicken problem (was: SODA and the Condorcet

2011-08-06 Thread fsimmons
Jan, IRV elects C like all of the other methods if the B faction doesn't truncate. But IRV elects A when the B faction truncates. Of course, with this knowledge, the B faction isn't likely to truncate, and as you say C will be elected. The trouble with IRV is that in the other scenario

[EM] AQ variant of DSC

2011-08-06 Thread fsimmons
One way of looking at Woodall's DSC method is that it is designed to elect from the clone set that extends up to the top rank on the greatest number of ballots, i.e. kind of the plurality winner among clone sets. There are two ways in which this description is not precise, but maybe we would

[EM] SODA and the Condorcet criterion

2011-08-05 Thread fsimmons
Jameson, as you say, it seems that SODA will always elect a candidate that beats every other candidate majority pairwise. If rankings are complete, then all pairwise wins will be by majority. So at least to the degree that rankings are complete, SODA satisfies the Condorcet Criterion.

Re: [EM] A DSV method inspired by SODA

2011-08-04 Thread fsimmons
Of course DSC and DAC are the same when rankings are complete. I was only going to use it to determine the first player, and with amalgamated factions (almost surely) the rankings would be complete. Of course there are many variations of this DSV idea [e.g. we could use chiastic approval to

Re: [EM] Amalgamation details, hijacking, and free-riding

2011-08-04 Thread fsimmons
- Original Message - From: Jameson Quinn Date: Wednesday, August 3, 2011 4:10 pm Subject: Re: Amalgamation details, hijacking, and free-riding To: fsimm...@pcc.edu Cc: election-methods@lists.electorama.com 2011/8/3 So if the true preferences are 20 AB 45 C? 35 (something

[EM] SODA and the Condorcet criterion

2011-08-04 Thread fsimmons
I want to thank Jameson for taking the ball and running with it on SODA. I really appreciate his talented and energetic work on elaborating, explaining, and selling the method. It's exciting to me to see the possibilities. Here's more evidence of monotonicity: With a three candidate cycle x

Re: [EM] Amalgamation details, hijacking, and free-riding

2011-08-03 Thread fsimmons
So if the true preferences are 20 AB 45 C? 35 (something else), the C supporters could spare 21 voters to vote AC so that the amalgamated factions would become 41 AC 24 C? 35 (something else) . I can see where it is possible for such a move to payoff, but it seems fairly innocuos compared

[EM] Record activity on the EM list?

2011-08-02 Thread fsimmons
Towards the end of July, I noticed that I had to scroll down a long ways in the archive to get to the most recent messages. I wonder if we set some kind of record. If we were approaching or receding from a major election, it would be more understandable. Maybe all of the feisty guys are

[EM] Amalgamation details

2011-08-01 Thread fsimmons
To amalgamate factions so that there is at most one faction per candidate X (in the context of range style ballots) take a weighted average of all of the ballots that give X top rating, where each ballot has weight equal to one over the number of candidates rated equal top on that ballot.

Re: [EM] A DSV method inspired by SODA

2011-07-31 Thread fsimmons
Jameson, for my benefit could you elaborate on what you mean by hijacking strategy, especially in the context of amalgamation of factions. Is ordinary Range susceptible to hijacking? If not, then neither is amalgamation of factions per se, since Range scores are identical with or without

[EM] Andy's Question

2011-07-30 Thread fsimmons
I think that Andy's question about who the PR winners should be in the three winner (approval) scenario 20 AC 20 AD 20 AE 20 BC 20 BD 20 BE needs more consideration. As was pointed out {C, D. E} seems the best, even though PAV would say the slates {A,B,C}, {A,B,D}, and {A,B,E} are tied for

[EM] A DSV method inspired by SODA

2011-07-30 Thread fsimmons
One of the features of SODA is a step where the candidates decide what their approval cutoffs will be.on behalf of themselves and the voters for whom they are acting as proxies. One of the many novel features is that instead of making these decisions simultaneously, the candidates make them

[EM] HBH

2011-07-29 Thread fsimmons
In HBH a pecking order is established on the basis of implicit approval or some other monotonic, clone consistent order like chiastic approval that has no incentive for order reversals and minimal incentive for collapsing (i.e. merging) of ratings. A monotone, clone consistent measure of

Re: [EM] Borda Done Right (with proof of clone consistency and monotonicity)

2011-07-28 Thread fsimmons
A modification I am considering: If all of the candidates are ranked on a ballot, then on that ballot keep the raw range scores without normalization, so the lowest ranked candidate Z will be ranked at p(Z) which may or may not be zero. But on ballots with one or more truncations do the

[EM] Minimal Zero Info Range Strategy

2011-07-28 Thread fsimmons
Here's a minimal range strategy that anybody with an adding machine could carry out: First rate all of the candidates sincerely (whatever that means). Then add up all of the scores to get the number S. Divide S by the maxRange value to get a whole number quotient Q and remainder R.less than

[EM] Single Contest Method

2011-07-27 Thread fsimmons
Andy's chiastic method is a way of utilizing range ballots that has a much more mild incentive than Range itself to inflate ratings. He locates the method in a class of methods each of which is based on a different increasing function f from the interval [0,1 ] into the same interval: Elect

[EM] Borda Done Right (with proof of clone consistency and monotonicity)

2011-07-27 Thread fsimmons
When someone pointed out to Borda that his method led to strategic order reversals, he replied that he only intended it for honest voters. Unfortunately, that's only half the problem; Borda is highly sensitive to cloning: Assume honest votes: 80 AB 20 BA Candidate A wins by Borda and any

[EM] Automated Approval Winner

2011-07-25 Thread fsimmons
Here's an example of a monotone method for converting ranked ballots into approval ballots automatically: x: ABC y: BCA z: CAB First we convert to range ballots using first place numbers cumulatively: x: A(x+y+z), B(y+z),C(z) y: B(x+y+z), C(x+z), A(x) z: C(x+y+z), A(x+y), B(y) Now we

Re: [EM] Automated Approval methods (was Single Contest)

2011-07-24 Thread fsimmons
This kind of approach has been experimented with for a long time by Rob LeGrand, and there doesn't seem to be any good way to make it monotone. Here's a very conservative and simple approach that may have some value in some context, if not this one: For each rating ballot b approve the top

Re: [EM] How to make a summable version of STV

2011-07-23 Thread fsimmons
Kristopfer. Look at it this way, the process of amalgamating the factions is a low pass filter that gets rid of some fo the noise. So why not consider the resulting ballots as the true ballots, and the associated weights tell how many of them there are of each kinsd. STV can be done with

[EM] Single Contest

2011-07-23 Thread fsimmons
If one of the finalists is chosen by a method that satisfies the majority criterion, then you can skip step one, and the method becomes smoother. Here are some possibilities for the method that satisfies the majority criterion: DSC, Bucklin, and the following range ballot based method:

Re: [EM] Single Contest

2011-07-23 Thread fsimmons
From: Jameson Quinn To be clear: if X and Y are the same, there's no need for a runoff? That's right. I hope that isn't be too anticlimatic! 2011/7/23 If one of the finalists is chosen by a method that satisfies the majority criterion, then you can skip step one, and the method

Re: [EM] HBH

2011-07-22 Thread fsimmons
Toby, it is much easier to get a clone independent measure of distance or of proximity with range style ballots than with voter rankings, i.e. cardinal ratings are better than ordinal rankings in this context. Once you have a way of measuring distance (or alternatively proximity) between

Re: [EM] SODA

2011-07-21 Thread fsimmons
I like it! - Original Message - From: Jameson Quinn Date: Thursday, July 21, 2011 4:11 am Subject: Re: [EM] SODA To: fsimm...@pcc.edu Cc: election-methods@lists.electorama.com For generic SODA, the current rule is: candidates exercise their ballots in descending order of

Re: [EM] Stats on HBH and a few others

2011-07-20 Thread fsimmons
Kevin, Thanks for running these! This is valuable information. From: Kevin Venzke Hi Forest, I ran some small batches of simulations under a handful of scenarios (1D and also aspectral) to try to get a sense of general trends. Then I averaged the numbers. Hopefully I didn't

Re: [EM] Correspondences between PR and lottery methods (was Centrist vs. non-Centrists, etc.)

2011-07-20 Thread fsimmons
From: Andy Jennings On Mon, Jul 18, 2011 at 6:00 PM, wrote: Andy and I were thinking mostly of Party Lists via RRV. His question was that if we used RRV, either sequential or not, would we get the same result as the Ultimate Lottery Maximization. I was able to show to our

[EM] SODA

2011-07-20 Thread fsimmons
In our SODA development we came to something of an impasse for determining the order of play for the candidates casting their approval cutoffs. Here's a suggestion: Let the DSC winner go first, because the DSC winner is easily calculated, satisfies Later-No-Harm (so does not unduly encourage

Re: [EM] SODA

2011-07-20 Thread fsimmons
Sounds good. - Original Message - From: Jameson Quinn I would like to keep generic SODA as simple as possible, to make it easier to promote for practical use. However, I am still interested in figuring out the best possible SODA+ method, using DSC or whatever. For generic SODA,

Re: [EM] HBH

2011-07-20 Thread fsimmons
Good idea. Let's play with it. - Original Message - From: Toby Pereira Date: Wednesday, July 20, 2011 4:44 pm Subject: Re: [EM] HBH To: fsimm...@pcc.edu Cc: election-methods@lists.electorama.com I was thinking - Schulze STV compares every result against every other result that

[EM] covering in the context of range style ballots

2011-07-20 Thread fsimmons
It recently struck me that in range we can strengthen the covering relation if we include the range levels as virtual candidates: An alternative beats level L pairwise iff it is rated above L on more ballots than it is rated below L. Then for an alternative to cover Y, it has to beat Y

Re: [EM] HBH

2011-07-19 Thread fsimmons
From: Kevin Venzke Hi Forest, --- En date de?: Lun 18.7.11, fsimm...@pcc.edu a ?crit?: The pecking order is the Range order. Assume no ties. I suppose that you could use the range order for the pecking order, but as you mention below that could lead to some strategic

Re: [EM] Correspondences between PR and lottery methods (was Centrist vs. non-Centrists, etc.)

2011-07-19 Thread fsimmons
It sounds like you guys are straightening out the confusion, and exploring some good ideas. - Original Message - From: Toby Pereira Date: Tuesday, July 19, 2011 7:47 am Subject: Re: [EM] Correspondences between PR and lottery methods (was Centrist vs. non-Centrists, etc.) To: Kristofer

[EM] HBH

2011-07-18 Thread fsimmons
HBH stands for Hog Belly Honey, the name of an inerrant nullifier invented by a couple of R.A. Lafferty characters. The HBH is the only known nullifier that can posit moral and ethical judgments, set up and enforce categories, discern and make full philosophical pronouncements, in other

Re: [EM] HBH (typo correction)

2011-07-18 Thread fsimmons
- HBH stands for Hog Belly Honey, the name of an inerrant nullifier invented by a couple of R.A. Lafferty characters. The HBH is the only known nullifier that can posit moral and ethical judgments, set up and enforce categories, discern and make full philosophical pronouncements, in other

Re: [EM] HBH

2011-07-18 Thread fsimmons
From: Kevin Venzke Hi Forest, So here's my summary using a 4-slot ballot and 3 candidates let's say. The pecking order is the Range order. Assume no ties. I suppose that you could use the range order for the pecking order, but as you mention below that could lead to some strategic

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