Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-16 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: er... Is this right? I thought your penalty in the 3c case would have to be just a single candidate's first preferences. I think I am probably right here. If you draw a triangle with ABC, you have two cycle possibilities. In both cycles IRV elects the winner between A and

Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-16 Thread Jameson Quinn
2011/6/16 Kristofer Munsterhjelm km_el...@lavabit.com Kevin Venzke wrote: er... Is this right? I thought your penalty in the 3c case would have to be just a single candidate's first preferences. I think I am probably right here. If you draw a triangle with ABC, you have two cycle

Re: [EM] Defensive strategy for Condorcet methods

2011-06-15 Thread Kevin Venzke
Hi Juho, I have to trim this due to being short on time. --- En date de : Mar 14.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : If the answer is no or almost never, and I'm the only nutty voter that wants to vote ACB, lose nothing, maybe gain, with everyone else voting sincerely,

Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-15 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: Hi Kristofer, --- En date de : Lun 13.6.11, Kristofer Munsterhjelm km_el...@lavabit.com a écrit : If you want something that deters burial strategy, how about what I called FPC? Each candidate's penalty is equal to the number of first-place votes for those who beat him

Re: [EM] Defensive strategy for Condorcet methods JQ

2011-06-15 Thread Kevin Venzke
Hi Jameson, --- En date de : Mar 14.6.11, Jameson Quinn jameson.qu...@gmail.com a écrit : [start quote] Of course, this causes favorite betrayal strategy, because you may care more about giving a penalty than about helping your honest favorite. And this strategy is obvious enough that I think

Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-15 Thread Kevin Venzke
Hi Kristofer, --- En date de : Mer 15.6.11, Kristofer Munsterhjelm km_el...@lavabit.com a écrit : I guess that anything else that does something similar would have a similar advantage. FPC has some problems, though, as Jameson Quinn pointed out. It is possible to reduce the compromise

Re: [EM] Defensive strategy for Condorcet methods KM edit

2011-06-15 Thread Kevin Venzke
Edit: --- En date de : Mer 15.6.11, Kevin Venzke step...@yahoo.fr a écrit : I am not sure I am able to follow this. In the first paragraph, if Y is the CW, you can't have an XYZX cycle created by X voters. I just realized you're not talking about a cycle but a score order. Also am I

Re: [EM] Defensive strategy for Condorcet methods

2011-06-15 Thread Juho Laatu
On 15.6.2011, at 14.23, Kevin Venzke wrote: Hi Juho, I have to trim this due to being short on time. Thanks, compact opinions are always a good approach. In margins (and maybe in other variants too) ties should not carry any other additional meaning but that the voter didn't support XY

Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-15 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: Hi Kristofer, --- En date de : Mer 15.6.11, Kristofer Munsterhjelm km_el...@lavabit.com a écrit : I guess that anything else that does something similar would have a similar advantage. FPC has some problems, though, as Jameson Quinn pointed out. It is possible to reduce

Re: [EM] Defensive strategy for Condorcet methods KM

2011-06-15 Thread Kevin Venzke
Hi Kristofer, Quick one: --- En date de : Mer 15.6.11, Kristofer Munsterhjelm km_el...@lavabit.com a écrit : I haven't tested FPC (since my reimplementation of JGA's strategy ideas was done before I moved to a more modular design for Quadelect), but as far as I recall, the really standout

Re: [EM] Defensive strategy for Condorcet methods

2011-06-14 Thread Juho Laatu
On 13.6.2011, at 17.33, Kristofer Munsterhjelm wrote: Kevin Venzke wrote: Is Condorcet//FPP a bad method? I agree with Jameson Quinn, the gap is too far and so it could be quite tempting to compromise as in FPTP (and failing that, to engineer a cycle if your candidate has great first

Re: [EM] Defensive strategy for Condorcet methods

2011-06-14 Thread Jameson Quinn
If you want something that deters burial strategy, how about what I called FPC? Each candidate's penalty is equal to the number of first-place votes for those who beat him pairwise. Lowest penalty wins. Burying a candidate may help in engineering a cycle, but it can't stack more first-place

Re: [EM] Defensive strategy for Condorcet methods

2011-06-13 Thread Jameson Quinn
Is Condorcet//FPP a bad method? Yes. The danger is that FPP strategy would dominate Condorcet strategy. This is especially true since people are so used to FPP strategy. How about a method where, if there is a cycle, we take the top three FPP candidates (call them ABC in descending

Re: [EM] Defensive strategy for Condorcet methods

2011-06-13 Thread Kristofer Munsterhjelm
Kevin Venzke wrote: Is Condorcet//FPP a bad method? I agree with Jameson Quinn, the gap is too far and so it could be quite tempting to compromise as in FPTP (and failing that, to engineer a cycle if your candidate has great first place support). Smith,FPP... perhaps better, but there's

Re: [EM] Defensive strategy for Condorcet methods

2011-06-12 Thread Kevin Venzke
Hi Juho, --- En date de : Sam 11.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : Maybe strategic, maybe misled to think that ranking C above B would always decrease the chances of B to win, maybe you want to discourage B by showing that he is not much more popular than C. Why

Re: [EM] Defensive strategy for Condorcet methods DK

2011-06-11 Thread Kevin Venzke
Hi Dave, --- En date de : Jeu 9.6.11, Dave Ketchum da...@clarityconnect.com a écrit : Seems that some are so lacking in understanding Condorcet that they fear it.  So, a couple basics: .  The voter can rank such as A=B=C, saying exactly equal approval of these three over all other

Re: [EM] Defensive strategy for Condorcet methods

2011-06-11 Thread Kevin Venzke
Hi Juho, --- En date de : Ven 10.6.11, Juho Laatu juho.la...@gmail.com a écrit : --- En date de : Jeu 9.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : No, I wouldn't say that. I do think there are methods that offer two bad options and one of them is burial, though. (There is no

Re: [EM] Defensive strategy for Condorcet methods

2011-06-11 Thread Juho Laatu
On 12.6.2011, at 0.26, Kevin Venzke wrote: Hi Juho, --- En date de : Ven 10.6.11, Juho Laatu juho.la...@gmail.com a écrit : --- En date de : Jeu 9.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : No, I wouldn't say that. I do think there are methods that offer two bad options and one of

Re: [EM] Defensive strategy for Condorcet methods

2011-06-10 Thread Juho Laatu
On 10.6.2011, at 3.04, Kevin Venzke wrote: Hi Juho, --- En date de : Jeu 9.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : No, I wouldn't say that. I do think there are methods that offer two bad options and one of them is burial, though. (There is no working strategy, but there are

Re: [EM] Defensive strategy for Condorcet methods

2011-06-09 Thread Juho Laatu
On 9.6.2011, at 5.28, Kevin Venzke wrote: Hi Juho, --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : There has been quite a lot of discussion around the strategic vulnerabilities of Condorcet

Re: [EM] Defensive strategy for Condorcet methods

2011-06-09 Thread Kevin Venzke
Hi Juho, --- En date de : Jeu 9.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : No, I wouldn't say that. I do think there are methods that offer two bad options and one of them is burial, though. (There is no working strategy, but there are some options??) Absolutely. I'm being honest

Re: [EM] Defensive strategy for Condorcet methods

2011-06-09 Thread Dave Ketchum
Seems that some are so lacking in understanding Condorcet that they fear it. So, a couple basics: . The voter can rank such as A=B=C, saying exactly equal approval of these three over all other candidates. This has the same effect as it would have in true Approval. . The voter can rank

[EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Juho Laatu
There has been quite a lot of discussion around the strategic vulnerabilities of Condorcet methods on this list recently. In general I think Condorcet methods are one of the least vulnerable to strategies, and in most typical elections their vanilla versions are simply good enough. In the case

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Jameson Quinn
It's easy to minimize the problems with one's preferred systems, and focus on the problems with other systems you see as competing for mindshare. It's not even dishonest: the truth is that, compared to the giant issues with plurality, any good system has problems that are minor, but that on the

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Juho Laatu
On 8.6.2011, at 16.33, Jameson Quinn wrote: It's easy to minimize the problems with one's preferred systems, and focus on the problems with other systems you see as competing for mindshare. It's not even dishonest: the truth is that, compared to the giant issues with plurality, any good

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Jameson Quinn
In SODA I'm most worried about the Approval related problems, Do you mean the near-clone game-of-chicken problems? These apply to WV Condorcet methods too (although less-obviously to an unsophisticated voter), and with margins, there is the opposite burial problem: 35: AB 25: B 40: C What

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Juho Laatu
On 8.6.2011, at 18.58, Jameson Quinn wrote: In SODA I'm most worried about the Approval related problems, Do you mean the near-clone game-of-chicken problems? Yes. These apply to WV Condorcet methods too (although less-obviously to an unsophisticated voter), and with margins, there is

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Andy Jennings
On Wed, Jun 8, 2011 at 8:58 AM, Jameson Quinn jameson.qu...@gmail.comwrote: From my experience talking to normal people not already interested in voting or math, I think that it is very important to keep your list of proposals short. 1 is good, 2 is tolerable, 3 is approximately pointless,

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Kevin Venzke
Hi Juho, --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : There has been quite a lot of discussion around the strategic vulnerabilities of Condorcet methods on this list recently. In general I think Condorcet methods are one of the least vulnerable to strategies, and in

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Juho Laatu
On 9.6.2011, at 1.31, Kevin Venzke wrote: Hi Juho, --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : There has been quite a lot of discussion around the strategic vulnerabilities of Condorcet methods on this list recently. In general I think Condorcet methods are one

Re: [EM] Defensive strategy for Condorcet methods

2011-06-08 Thread Kevin Venzke
Hi Juho, --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : --- En date de : Mer 8.6.11, Juho Laatu juho4...@yahoo.co.uk a écrit : There has been quite a lot of discussion around the strategic vulnerabilities of Condorcet methods on this list recently. In general I