Difference between revisions of "Method evaluation poll"

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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.
  
== Particlar methods ==
+
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.
  
Please rate the following methods on a scale from 0 to 10, on '''merit alone''' (That is, leaving the issue of public salability aside, how well will the method perform in a large, contentious electorate?)
+
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! Try to keep the columns tidy so that it's clear whose scores are whose. The format of this poll is based on that of the [[Essential Questions|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. Also, there is no official tally method, and no official winner will be declared.
 +
 
 +
== the participants ==
 +
JG James Green-Armytage
 +
CB Chris Benham
 +
KV Kevin Venzke
 +
DK Dave Ketchum
 +
MO Mike Ossipoff
 +
RL Rob Lanphier
 +
JF Jeff Fisher
 +
 
 +
== the methods ==
  
 
=== binary input ===
 
=== binary input ===
JG
+
 
[[Plurality]]
+
    JG   CB  KV  DK  MO  RL  JF
3
+
[[Plurality]]
[[runoff|Two round runoff]]
+
    2    0    2    2    0    0    0
4
+
[[Runoff voting|Two round runoff]]
[[Approval]]
+
    3    3    3    3    0    2    2
7
+
[[Approval voting|Approval]]
 +
    6    4   8    5    9    5    9
 +
[[Random Ballot|Random Ballot]]
 +
    0    0    1    1    0    0    2
  
 
=== ranking input ===
 
=== ranking input ===
Line 17: Line 32:
 
==== not Condorcet-efficient ====
 
==== not Condorcet-efficient ====
  
     SR  JH  JG KV MO
+
     JG   CB  KV   DK  MO   RL  JF
 
+
[[Borda count]]    
[[Borda count]]
+
    1    0    0    0    0    0    4
 
+
[[IRV]] without equal rankings
[[IRV]] without equal rankings
+
    4    7    3    3    0    4    2
 
+
ER-IRV(whole)
ER-IRV(whole)
+
    6    4    ?    ?    0    ?    2
 
+
ER-IRV(fractional)
ER-IRV(fractional)
+
    6    6    3    ?    0    ?    2
 +
[[Bucklin voting|Bucklin]] without equal rankings
 +
  3?    5    6    0        ?    6
 +
[[ER-Bucklin|ER-Bucklin(whole)]]
 +
5.5?    6.5  7        2    ?    4
 +
[[ER-Bucklin|ER-Bucklin(fractional)]]
 +
    ?    5?    5              ?    5
 +
[[Descending Acquiescing Coalitions]] (DAC)
 +
        3?    4                   
 +
[[Descending Solid Coalitions]]
 +
        2?    2
  
 
==== nearly Condorcet-efficient ====
 
==== nearly Condorcet-efficient ====
  
     SR  JH  JG KV MO
+
     JG   CB  KV   DK  MO   RL  JF
 
+
[[MMPO|minmax(pairwise opposition)]]
[[MMPO|minmax(pairwise opposition)]]
+
    5    3?  4    ?    0  ?    4
 
+
[[CDTT|CDTT,IRV]]
[[CDTT,IRV]]
+
    7    5?  5    ?    ?  ?    4
 +
[[CDTT|CDTT,minmax(pairwise opposition)]]
 +
    ?    3?  6    ?    ?  ?    5
 +
[[Improved Condorcet Approval]] ([[ICA]]), a.k.a. [[Condorcet//Approval]] with [[FBC]] tweak)
 +
    6?    6?  9    ?    ?  ?    5
 +
[[Majority Defeat Disqualification Approval]] ([[MDDA]])
 +
    6?    5?  8        10  ?    6
 +
[[MDD,ER-Bucklin(whole)]]
 +
          8?
  
 
==== Condorcet-efficient ====
 
==== Condorcet-efficient ====
  
     SR  JH  JG KV MO
+
     JG   CB  KV   DK  MO   RL  JF
 
+
[[ranked pairs]](WV)
[[ranked pairs]](WV)
+
    7    7    8    8    8    9    8
 
+
[[ranked pairs]](margins)
[[ranked pairs]](margins)
+
    2    4    3    3    0    6    ?
 
+
[[river]](wv)
[[beatpath]](WV)
+
    7    7    8    7    8    ?    9
 
+
[[Schulze method|Schulze]](WV)
[[beatpath]](margins)
+
    7    7    8    7    8    9    8
 
+
[[Schulze method|Schulze]](margins)
[[sequential dropping]](WV)
+
    2    4    3    3    0    5    ?
 
+
[[sequential dropping]](WV)
[[minmax]](WV)
+
    7    ?    7    ?    5    ?    8
 
+
[[minmax]](WV)                
    SR  JH  JG KV MO
+
    4  ?    7    7    4    5    7
 
+
  [[minmax]](margins)    
[[minmax]](margins)
+
    1    ?    3    3    0    5    ?
 
+
[[Smith//minmax]](WV)  
[[Smith//minmax]](WV)
+
    6    ?    7    ?  4.5    9    8
 
+
[[Smith//minmax]](margins)
[[Smith//minmax]](margins)
+
    2    ?    3    ?    0    5    ?
 
+
[[Nanson]]
[[Nanson]]
+
  5.5?  ?    3    ?    0    ?    5
 
+
[[Raynaud]]
[[Raynaud]]
+
    6?    3?    3    3    0    ?    6
 +
[[Smith,IRV]] or [[Schwartz,IRV]]
 +
          8
  
 
=== ranking input with approval cutoff ===
 
=== ranking input with approval cutoff ===
  
     SR  JH  JG KV MO
+
     JG   CB  KV   DK    MO   RL  JF
 
+
[[Definite Majority Choice|definite majority choice]] a.k.a. [[Ranked Approval Voting|ranked approval voting]]
[[Definite majority choice]]
+
  6.5  9.5    6    3    1    ?    5
 
+
[[CWP|approval weighted pairwise]] (e.g. with ranked pairs base)
[[CWP|Approval weighted pairwise]]
+
    9    8?    7    3    1    ?    4
 
+
[[approval margins]]
[[Approval margins]]
+
  5.5  8.5    ?    3    1    ?    ?
 +
[[Imagine Democratic Fair Choice|democratic fair choice (DFC)]]
 +
    ?    5?    3    3      1    ?    4
 +
Schwartz//Approval or Smith//Approval (See [[Condorcet//Approval]])
 +
        5?      4          1        10
 +
[[Condorcet//Approval]]    
 +
        4?      4            1        10
 +
[[Definite Majority,IRV]]
 +
        8
  
 
=== rating input ===
 
=== rating input ===
  
     SR  JH  JG  KV MO
+
     JG  CB  KV   DK  MO   RL
 
+
[[range voting]] (ratings summation)
[[range voting]]
+
  5.5      5    2  9.1
 
+
[[Median Ratings|median ratings]]
[[ranked pairs]](cardinal pairwise)
+
    3      4    2    2
 
+
ranked pairs([[cardinal pairwise]])
[[beatpath]](cardinal pairwise)
+
  9.5  8?  5    2    5
 +
[[Schulze method|Schulze]]([[cardinal pairwise]])
 +
  9.5  8?  5    2    5
 +
[[Automated DMC]]
 +
      10
  
 
=== other ===
 
=== other ===
  
[[candidate withdrawal option|CWO]]-ER-IRV(whole)
+
    JG  CB  DK  MO
 
+
[[candidate withdrawal option|CWO]]-ER-IRV(whole)
[[candidate withdrawal option|CWO]]-ER-IRV(fractional)
+
    7  2?    1    4
 
+
[[candidate withdrawal option|CWO]]-ER-IRV(fractional)
[[candidate withdrawal option|CWO]]-ranked pairs(WV)
+
    8  3?    1    3
 
+
[[candidate withdrawal option|CWO]]-ranked pairs(WV)
[[candidate withdrawal option|CWO]]-ranked ballot plurality
+
    8        1    5
 +
[[candidate withdrawal option|CWO]]-ranked ballot plurality
 +
    6  1?    1    1
 +
[[MMPO|minmax(pairwise opposition)]] with [[AERLO]] and [[ATLO]]
 +
    4  3?    ?    0
 +
[[MMPO]] with AERLO, ATLO, & [[Power Truncation]]
 +
    ?  0??          0
 +
[[MMPO]] with (only) [[Power Truncation]]
 +
    ?  0??          10
 +
[[Schulze method|Schulze]](WV) with AERLO and ATLO
 +
    8  3?      ?    8.5
 +
[[Schulze method|Schulze]](WV) with [[strong/weak preference option]]
 +
  7.5  5?      ?      ?
 +
[[random jury]] method
 +
    ?  0      1  1
  
[[MMPO|minmax(pairwise opposition)]] with AERLO and ATLO
+
== See also ==
  
[[beatpath]](WV)with AERLO and ATLO
+
*[[Essential Questions]] poll
 +
*[[Method support poll]]

Latest revision as of 00:16, 13 January 2006

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! Try to keep the columns tidy so that it's clear whose scores are whose. 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. Also, there is no official tally method, and no official winner will be declared.

the participants

JG James Green-Armytage
CB Chris Benham
KV Kevin Venzke
DK Dave Ketchum
MO Mike Ossipoff 
RL Rob Lanphier
JF Jeff Fisher

the methods

binary input

   JG   CB   KV   DK   MO   RL   JF
Plurality
    2    0    2    2    0    0    0
Two round runoff
    3    3    3    3    0    2    2
Approval
    6    4    8    5    9    5    9
Random Ballot
    0    0    1    1    0    0    2

ranking input

not Condorcet-efficient

   JG   CB   KV   DK   MO   RL   JF
Borda count     
   1     0    0    0    0    0    4
IRV without equal rankings
   4     7    3    3    0    4    2
ER-IRV(whole)
   6     4    ?    ?    0    ?    2
ER-IRV(fractional)
   6     6    3    ?    0    ?    2
Bucklin without equal rankings
  3?     5    6    0         ?     6
ER-Bucklin(whole)
5.5?    6.5   7         2    ?    4
ER-Bucklin(fractional)
   ?    5?    5              ?    5
Descending Acquiescing Coalitions (DAC)
        3?    4                     
Descending Solid Coalitions
        2?    2

nearly Condorcet-efficient

   JG   CB   KV   DK   MO   RL   JF
minmax(pairwise opposition)
    5    3?   4    ?    0   ?    4
CDTT,IRV
    7    5?   5    ?    ?   ?    4
CDTT,minmax(pairwise opposition)
    ?    3?   6    ?    ?   ?    5
Improved Condorcet Approval (ICA), a.k.a. Condorcet//Approval with FBC tweak)
   6?    6?   9    ?    ?   ?    5
Majority Defeat Disqualification Approval (MDDA)
   6?    5?   8        10   ?    6
MDD,ER-Bucklin(whole)
         8?

Condorcet-efficient

   JG   CB   KV   DK   MO   RL   JF
ranked pairs(WV)
    7    7    8    8    8    9    8
ranked pairs(margins)
    2    4    3    3    0    6    ?
river(wv)
    7    7     8    7    8    ?    9
Schulze(WV)
    7    7    8    7    8    9    8
Schulze(margins)  
    2    4    3    3    0    5    ?
sequential dropping(WV)
    7    ?    7    ?    5    ?    8
minmax(WV)                  
    4   ?     7    7    4    5    7
minmax(margins)     
    1    ?    3    3    0    5    ?
Smith//minmax(WV)    
    6    ?    7    ?  4.5    9    8
Smith//minmax(margins)
    2    ?    3    ?    0    5    ?
Nanson
  5.5?   ?    3    ?    0    ?    5
Raynaud
   6?    3?    3    3    0    ?    6
Smith,IRV or Schwartz,IRV
         8

ranking input with approval cutoff

   JG   CB   KV   DK    MO   RL   JF
definite majority choice a.k.a. ranked approval voting
  6.5  9.5    6    3     1     ?    5
approval weighted pairwise (e.g. with ranked pairs base)
    9    8?    7    3     1    ?    4
approval margins
  5.5   8.5    ?    3     1    ?    ?
democratic fair choice (DFC)
   ?    5?     3    3      1     ?    4
Schwartz//Approval or Smith//Approval (See Condorcet//Approval)
        5?      4           1        10
Condorcet//Approval     
        4?      4            1        10
Definite Majority,IRV
        8

rating input

   JG  CB   KV   DK   MO    RL
range voting (ratings summation)
  5.5       5    2   9.1
median ratings
    3       4    2    2
ranked pairs(cardinal pairwise)
  9.5  8?   5    2    5
Schulze(cardinal pairwise)
  9.5  8?   5    2    5
Automated DMC
      10

other

   JG  CB   DK   MO
CWO-ER-IRV(whole)
    7  2?    1    4
CWO-ER-IRV(fractional)
    8  3?    1    3
CWO-ranked pairs(WV)
    8        1    5
CWO-ranked ballot plurality
    6  1?    1     1
minmax(pairwise opposition) with AERLO and ATLO
    4  3?     ?     0
MMPO with AERLO, ATLO, & Power Truncation
    ?  0??          0
MMPO with (only) Power Truncation 
    ?  0??          10
Schulze(WV) with AERLO and ATLO
    8  3?      ?    8.5
Schulze(WV) with strong/weak preference option
  7.5  5?      ?       ?
random jury method
    ?  0      1   1

See also