[EM] Condocet with many candidates - two round elections considered

2010-06-16 Thread Peter Zbornik
Dear all, dear Markus Schulze, after having presented Condorcet elections to some people in the Czech green party, the following question came up. Condorcet elections might work with three candidates, but what about if there are twenty of them, will the system work and elect the best candidate?

[EM] Thoughts on a nomination simulation

2010-06-16 Thread Kevin Venzke
Hello, The last thing I did with my simulation is check whether on average a candidate would prefer to have withdrawn (considering the results of thousands of trials of one position) than stand, with the assumption that they care what happens when they lose. (I'm not sure that's actually a good

Re: [EM] Condocet with many candidates - two round elections considered

2010-06-16 Thread Kevin Venzke
Hi Peter, --- En date de : Mer 16.6.10, Peter Zbornik pzbor...@gmail.com a écrit : Dear all, dear Markus Schulze,   after having presented Condorcet elections to some people in the Czech green party, the following question came up. Condorcet elections might work with three candidates, but what

Re: [EM] Condocet with many candidates - two round elections considered

2010-06-16 Thread Peter Zbornik
Hi Kevin, thanks for your view on the topic. In election-theoretic language, what criterion is used to describe, that a method performs as well with many as with few candidates? There is a list of criterias in the table at:

Re: [EM] Condocet with many candidates - two round elections considered

2010-06-16 Thread robert bristow-johnson
On Jun 16, 2010, at 9:34 AM, Peter Zbornik wrote: after having presented Condorcet elections to some people in the Czech green party, the following question came up. Condorcet elections might work with three candidates, but what about if there are twenty of them, will the system work and

Re: [EM] Condocet with many candidates - two round elections considered

2010-06-16 Thread Juho
All common Condorcet methods work fine also with multiple candidates (although not all methods meet exactly the same criteria). The first problem are probably human behaviour related, i.e. people start hating the voting process if it is too tedious, and they may not rank all relevant

[EM] Irrelevant Ballots Independent Fallback Approval (IBIFA)

2010-06-16 Thread Chris Benham
 Irrelevant Ballots Independent Fallback Approval (IBIFA) is the name I've settled on for the method I proposed in a May 2010 EM post titled Bucklin-like method meeting Favorite Betrayal and Irrelevant Ballots.

[EM] Condorcet question - why not bullet vote

2010-06-16 Thread Peter Zbornik
Dear all, dear Markus Schulze, I got a second question from one of our members (actually the same guy which asked for the first time): If I just bullet vote in a Condorcet election, then I increase the chances of my candidate being elected. If I have a second or third option, the chances of my

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread robert bristow-johnson
On Jun 16, 2010, at 1:30 PM, Peter Zbornik wrote: Dear all, dear Markus Schulze, I got a second question from one of our members (actually the same guy which asked for the first time): If I just bullet vote in a Condorcet election, then I increase the chances of my candidate being

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Kevin Venzke
Hi Peter, My quick responses to this: --- En date de : Mer 16.6.10, Peter Zbornik pzbor...@gmail.com a écrit : I got a second question from one of our members (actually the same guy which asked for the first time): If I just bullet vote in a Condorcet election, then I increase the chances of

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Peter Zbornik
Hi Kristofer, thanks for a detailed answer. As you answer contingency, it might be beneficial to turn the question around. In what situations will bullet voting help my candidate to win (considering the advanced Condorcet systems)? Peter On Wed, Jun 16, 2010 at 8:14 PM, Kristofer Munsterhjelm

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Jameson Quinn
2010/6/16 robert bristow-johnson r...@audioimagination.com On Jun 16, 2010, at 1:30 PM, Peter Zbornik wrote: Dear all, dear Markus Schulze, I got a second question from one of our members (actually the same guy which asked for the first time): If I just bullet vote in a Condorcet

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Kevin Venzke
Hi Peter, --- En date de : Mer 16.6.10, Peter Zbornik pzbor...@gmail.com a écrit : In what situations will bullet voting help my candidate to win (considering the advanced Condorcet systems)? The simplest is probably the one you gave. For example: 43 A 27 B vs. BC 30 CB If B voters don't give

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Juho
Some more viewpoints that were not covered very well yet. 1) Typical (=all common) Condorcet methods make pairwise comparisons and derive the results from those comparisons. Changing one's vote from ABC to AB=C does not change the pairwise comparison results of ones favourite (A) against

[EM] Condorcet question - why not bullet vote?

2010-06-16 Thread Chris Benham
Peter, If I just bullet vote in a Condorcet election, then I increase the chances of my candidate being elected. Bullet voting in an election using a method that complies with the Condorcet criterion does I suppose somewhat increase the chance of your candidate being the Condorcet winner. But

Re: [EM] Thoughts on a nomination simulation

2010-06-16 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: Hello, The last thing I did with my simulation is check whether on average a candidate would prefer to have withdrawn (considering the results of thousands of trials of one position) than stand, with the assumption that they care what happens when they lose. (I'm not sure

Re: [EM] Condorcet question - why not bullet vote?

2010-06-16 Thread Peter Zbornik
Chris, thanks for pointing these things out. I didn't know about the Later-no-Help. You write: But all Condorcet methods fail Later-no-Help, and in some this effect is sufficiently strong for the method to have a random fill incentive. Do you know for which Condorcet methods this effect is

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Peter Zbornik
Juho, we have the example 49: A 48: BC 3: CB you wrote to me: - C loses to B, 3-48. In winning votes the strength of this loss is 48. - B loses to A, 48-49. In winning votes the strength of this loss is 49. - A loses to C, 49-51. In winning votes the strength of this loss is 51. Thus: If the

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Kevin Venzke
Hi Peter, --- En date de : Mer 16.6.10, Peter Zbornik pzbor...@gmail.com a écrit : Thus: If the three C voters will truncate then they will win instead of B in winning votes based Condorcet methods. This is correct, if proportional completion is not used (see page 42 in 

Re: [EM] Thoughts on a nomination simulation

2010-06-16 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: Hi Kristofer, --- En date de : Mer 16.6.10, Kristofer Munsterhjelm km-el...@broadpark.no a écrit : I think that a nomination simulation would have to be more complex, to take feedback into account. Candidates would position themselves somewhere in opinion space, then move

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Juho Laatu
On Jun 16, 2010, at 11:49 PM, Peter Zbornik wrote: Juho, we have the example 49: A 48: BC 3: CB you wrote to me: - C loses to B, 3-48. In winning votes the strength of this loss is 48. - B loses to A, 48-49. In winning votes the strength of this loss is 49. - A loses to C, 49-51. In

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Juho
On Jun 17, 2010, at 12:29 AM, Kevin Venzke wrote: Hi Peter, --- En date de : Mer 16.6.10, Peter Zbornik pzbor...@gmail.com a écrit : Thus: If the three C voters will truncate then they will win instead of B in winning votes based Condorcet methods. This is correct, if proportional

[EM] Election calculator / Czech Green Party case

2010-06-16 Thread Juho
I wrote some code to study proportionality in the Czech Green Party case. I uploaded some of that stuff also in the Internet in case you are interested to experiment with it. The code is purely experimental and draft and not very stable at the moment, i.e. no guarantees given, but right

Re: [EM] Condorcet question - why not bullet vote

2010-06-16 Thread Kevin Venzke
Hi Juho, --- En date de : Mer 16.6.10, Juho juho.la...@gmail.com a écrit : If you are using proportional completion (or symmetric completion) then you're not using winning votes, you're using margins. The described algorithm seemed to make the completion in a non-symmetric way, leading

Re: [EM] Thoughts on a nomination simulation

2010-06-16 Thread Dave Ketchum
On Jun 16, 2010, at 9:57 PM, Kevin Venzke wrote: Hi Kristofer, --- En date de : Mer 16.6.10, Kristofer Munsterhjelm km-el...@broadpark.no a écrit : Even so, the simulation would fail to catch certain aspects of the election cycle itself. Consider a two party state under FPTP. In a pure

Re: [EM] Thoughts on a nomination simulation

2010-06-16 Thread Dave Ketchum
On Jun 16, 2010, at 11:11 PM, Kevin Venzke wrote: Hi Dave, --- En date de : Mer 16.6.10, Dave Ketchum da...@clarityconnect.com a écrit : That is possible. Would primaries encourage that effect? If so, would we expect parties in two-party states without voter primaries to be closer to each