View source for 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! 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

== the methods ==

=== binary input ===

    JG   CB   KV   DK   MO   RL   JF
 [[Plurality]]
     2    2    2    2    0    0    0
 [[Runoff voting|Two round runoff]]
     3    5    3    3    0    2    2
 [[Approval voting|Approval]]
    5?    6    8    5    9    5    8
 [[Random Ballot|Random Ballot]]
     0    1    1    1    0    0    1

=== ranking input ===

==== not Condorcet-efficient ====

    JG   CB   KV   DK   MO   RL
 [[Borda count]]     
    1     3    0    0    0    0
 [[IRV]] without equal rankings
    4     7    3    3    0    4
 ER-IRV(whole)
    6     4    ?    ?    0    ?
 ER-IRV(fractional)
    6     6    3    ?    0    ?
 [[Bucklin voting|Bucklin]] without equal rankings
   3?    6.5   6    0         ?
 [[ER-Bucklin|ER-Bucklin(whole)]]
 5.5?          7         2    ?
 [[ER-Bucklin|ER-Bucklin(fractional)]]
    ?          5              ?

==== nearly Condorcet-efficient ====

    JG   CB   KV   DK   MO   RL
 [[MMPO|minmax(pairwise opposition)]]
     5    4    4    ?         ?
 [[CDTT|CDTT,IRV]]
     7    9    5    ?         ?
 [[CDTT|CDTT,minmax(pairwise opposition)]]
     ?    5    6    ?         ?
 [[ICA]], a.k.a. [[Condorcet//Approval]] with [[FBC]] patch ("[[tied at the top]]" rule)
    6?         9    ?         ?
 [[Majority Defeat Disqualification Approval]] ([[MDDA]])
    6?   7.5?  9        10    ?

==== Condorcet-efficient ====

    JG   CB   KV   DK   MO   RL   JF
 [[ranked pairs]](WV)
     7    7    8    8    4    9    8
 [[ranked pairs]](margins)
     2    4    3    3    0    6    ?
 [[river]](wv)
     7         8    7    4    ?    9
 [[beatpath]](WV)
     7    7    8    7    4    9    8
 [[beatpath]](margins)  
     2    4    3    3    0    5    ?
 [[sequential dropping]](WV)
     7    ?    7    ?    4    ?    8
 [[minmax]](WV)                  
     4   ?     7    7    3    5    7
 [[minmax]](margins)     
     1    ?    3    3    0    5    ?
 [[Smith//minmax]](WV)    
     6    ?    7    ?  3.5    9    9
 [[Smith//minmax]](margins)
     2    ?    3    ?    0    5    ?
 [[Nanson]]
   5.5?   ?    3    ?    0    ?    ?
 [[Raynaud]]
    6?    ?    3    3    0    ?    ?

=== ranking input with approval cutoff ===

    JG   CB   KV   DK    MO   RL
 [[Definite Majority Choice|definite majority choice]] a.k.a. [[Ranked Approval Voting|ranked approval voting]]
   6.5  8.5    6    3          ?
 [[CWP|approval weighted pairwise]] (e.g. with ranked pairs base)
     9    8    7    3     3    ?
 [[approval margins]]
   5.5    9    ?    3          ?
 [[Imagine Democratic Fair Choice|democratic fair choice (DFC)]]
    ?          3    3          ?

=== rating input ===

    JG   KV   DK   MO    RL
 [[range voting]] (ratings summation)
   5.5    5    2   8.75
 [[Median Ratings|median ratings]]
     3    4    2
 ranked pairs([[cardinal pairwise]])
   9.5    5    2    4
 beatpath([[cardinal pairwise]])
   9.5    5    2    4

=== other ===

    JG   DK   MO
 [[candidate withdrawal option|CWO]]-ER-IRV(whole)
     7    1    4
 [[candidate withdrawal option|CWO]]-ER-IRV(fractional)
     8    1    4
 [[candidate withdrawal option|CWO]]-ranked pairs(WV)
     8    1    5
 [[candidate withdrawal option|CWO]]-ranked ballot plurality
     6    1     1
 [[MMPO|minmax(pairwise opposition)]] with [[AERLO and ATLO]]
     4    ?    
 [[MMPO]] with AERLO, ATLO, & [[Power Truncation]]
     ?        
 [[MMPO]] with (only) [[Power Truncation]] 
     ?         
 [[beatpath]](WV) with AERLO and ATLO
     8    ?    4
 [[beatpath]](WV) with [[strong/weak preference option]]
   7.5    ?    4
 [[random jury]] method
     ?         1

== See also ==

[[Essential Questions]] poll