Re: [EM] IRV in San Francisco

2004-11-15 Thread Bart Ingles
Eric Gorr wrote: At 8:16 PM -0800 11/14/04, Bart Ingles wrote: Eric Gorr wrote: At 7:44 AM -0800 11/12/04, Justin Sampson wrote: On Fri, 12 Nov 2004, Eric Gorr wrote: > Well, it will cause IRV to fail the Independence of Clones Criterion and thereby be subject to a spoiler effect again. Doesn'

[EM] 3-slot method

2004-11-15 Thread Jobst Heitzig
Dear Chris! I though some time about your proposal and have some comments: First of all, it it not Condorcet, is it? It seems to me that in the following example, it will elect A though C is the CW: 2 A>C>B 4 A>B>C 4 C>B>A 1 C>A>B 2 B>C>A Defeats A>B(7:6), C>A(7:6), C>B(7:6), hence C is the CW. N

[EM] strength vs. length: Short Ranked Pairs (SRP)

2004-11-15 Thread Jobst Heitzig
Hi folks! In this message, I'd like to discuss beatpath strength vs. beatpath length and introduce a method (Short Ranked Pairs, SRP) designed to elect a candidate who has short beatpaths. As an introductory example, consider 10 candidates X1..X10 with the following defeat strengths (1=weak, 2=s

Re: [EM] San Francisco Mini-ranked vote

2004-11-15 Thread Brian Olson
On Nov 15, 2004, at 8:42 AM, Eric Gorr wrote: At 12:13 AM -0800 11/14/04, Brian Olson wrote: Using the same engine as the Election Calculator I ran the preliminary data through a collection of election methods. It turns out that no race was close enough to wind up with different results when a d

Re: [EM] IRV in San Francisco

2004-11-15 Thread Justin Sampson
On Mon, 15 Nov 2004, Eric Gorr wrote: > The only tie-breaker that I can think of in common usage (it gets > written in to proposed laws) which would cause the implementation of IRV > to fail ICC would be what I have called "deterministic"...where all > candidates tied for least votes are eliminate

Re: [EM] San Francisco Mini-ranked vote

2004-11-15 Thread Eric Gorr
At 12:13 AM -0800 11/14/04, Brian Olson wrote: Using the same engine as the Election Calculator I ran the preliminary data through a collection of election methods. It turns out that no race was close enough to wind up with different results when a different method is used. But, if you want to s

Re: [EM] IRV in San Francisco

2004-11-15 Thread Eric Gorr
At 8:16 PM -0800 11/14/04, Bart Ingles wrote: Eric Gorr wrote: At 7:44 AM -0800 11/12/04, Justin Sampson wrote: On Fri, 12 Nov 2004, Eric Gorr wrote: > Well, it will cause IRV to fail the Independence of Clones Criterion and thereby be subject to a spoiler effect again. Doesn't IRV suffer from s