[EM] Condorcet - let's move ahead

Dave Ketchum davek at clarityconnect.com
Fri Jan 16 14:11:44 PST 2009

a range voting list?  It started as such, but where do you draw a proper 
fence around the edges?  Management of this list has been quite tolerant.

I have this same thread on Election-methods, and this post will go to both.

Range vs Condorcet?
      Range voters rate candidates, and difference in a voter's rating of 
two such shows strength of relative approval.  Sum of all these rating 
differences shows strength of A>B or B>A.
      Condorcet voters rank each pair as A>B or B>A or (A=B if neither is 
ranked over the other).  Count of rankings decides winner.
      I see each as having merit, but prefer Condorcet.

I mentioned IRV in a side discussion where I was responding to a suggestion 
that Plurality would properly resolve Condorcet cycles.  I offered IRV as 
better than Plurality for this purpose, WITHOUT agreeing that IRV would be 
good for this purpose.

On Fri, 16 Jan 2009 14:50:05 -0500 (EST) Dale Sheldon wrote:
> On Fri, 16 Jan 2009, Dave Ketchum wrote:
>>Condorcet/IRV would make a better pair since the voters would do the same
>>ranking for both, and IRV would, usually, pick the CW when such exists.
> Just so we're clear, you mean:
> * Elect the Condorcet winner, if one exist.
> * If one does not exist, elect the IRV winner (presumably from among the 
> set of leading candidates tied into the cycle, i.e., the Smith set).
>>Anyway, trying for a better method (the proper goal) would start with 
>>ranked voting
> Apologies if this has been covered recently (I did just join the list 
> earlier this week, and tried to read back a reasonable time frame, but I 
> may have missed something vital), but what is your basis for this 
> assumption?  Why is range voting (I thought this was a range voting list 
> :) being discarded out of hand?
>>Probably not possible to find a uniquely best cycle resolution
> It is, infact, provably impossible.
Huh?  Certainly there are rejects and lemons, but what prevents having a best?
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  Dave Ketchum   108 Halstead Ave, Owego, NY  13827-1708   607-687-5026
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