Method evaluation poll 2005

Please rate the following single-winner methods on a scale from 0 to 10, on functional merit alone. That is, leaving the issue of public salability aside, how well will the method perform in a large, contentious electorate? Decimal ratings are allowed.

The answers you give on your first pass through the survey need not be final. Please feel free to change/update your answers as many times as you like. You may leave a question mark next to your score for a given method if you are particularly uncertain about that score, and you may also substitute a question mark for the number if you feel unable to evalute the method.

Feel free to add more methods to the poll, especially interesting ones! This goes without saying, but please don't change other people's ratings! The format of this poll is based on that of the essential questions poll. Please identify yourself by your initials in the body of the poll, and in the participants section at the top of the poll. This poll will be ongoing; that is, it has no closing date.

the participants

JG James Green-Armytage
CB Chris Benham
KV Kevin Venzke

the methods

binary input

   JG       CB   KV   ??   ??
Plurality
    2       2     2
Two round runoff
    3       5     3
Approval
   5?       6     8
Random Ballot
    1       1     1

ranking input

not Condorcet-efficient

   JG     CB   KV   ??   ??
Borda count
   1       4    0
IRV without equal rankings
   4       7    3
ER-IRV(whole)
   6       4    ?
ER-IRV(fractional)
   6       6    3
Bucklin
  3?       6    6

nearly Condorcet-efficient

   JG      CB    KV   ??   ??
minmax(pairwise opposition)
    5       8     7
CDTT,IRV
    7      9.5    7
CDTT,MMPO
                  8

Condorcet-efficient

   JG      CB    KV  ??   ??
ranked pairs(WV)
    7       7     8
ranked pairs(margins)
    2       4     3
river(wv)
    7             8
beatpath(WV)
    7       7     8
beatpath(margins)
    2       4     3
sequential dropping(WV)
    7       ?     7
minmax(WV)
    4       ?     7
minmax(margins)
    1       ?     3
Smith//minmax(WV)
    6       ?     7
Smith//minmax(margins)
    2       ?     3
Nanson
   4?       ?     3
Raynaud
    5       ?     3

ranking input with approval cutoff

   JG      CB    KV   ??   ??
definite majority choice
  6.5      8.5   6
approval weighted pairwise (e.g. with ranked pairs base)
    9       8    8
approval margins
  5.5       9    ?
democratic fair choice (DFC)
   ?             3

rating input

   JG   ??   ??   ??   ??
range voting (ratings summation)
  5.5        
median ratings
    3        
ranked pairs(cardinal pairwise)
   10        
beatpath(cardinal pairwise)
   10

other

   JG   ??   ??   ??   ??
CWO-ER-IRV(whole)
    7        
CWO-ER-IRV(fractional)
    8        
CWO-ranked pairs(WV)
    8        
CWO-ranked ballot plurality
    6        
minmax(pairwise opposition) with AERLO and ATLO
    4        
beatpath(WV) with AERLO and ATLO
    8       
beatpath(WV) with strong/weak preference option
  7.5