[EM] Single Winner Systems categorization

[Dr.Ernie Prabhakar]

Hi Tom,

It seems like an noble effort, and I appreciate the work.  I'm still a 
little unclear on what you mean by 'one vote'.  Do you mean one vote 
per candidate, one vote per position, or one vote per ballot?

-- Ernie P.

On Jun 11, 2004, at 2:21 PM, Tom Ruen wrote:

> Below is my proposed categorization for the Wikipedia "Election 
> system" page
> listing single winner systems.
> http://en.wikipedia.org/wiki/Voting_system#Single_Winner_Systems
>
> My biggest change (from the current page) reclassifies "Yes/No Voting" 
> into
> "One Choice voting", and moved Approval to the "Rated Value Voting"
> category.
>
>
> I hope my "One Choice Vote" category will be recognizes as unique, 
> even if
> it doesn't offer all the fun games of more advanced methods.
>
> I also removed the "tied-ranking" subcategory for Ranked Choice since I
> don't believe it is well defined which methods can allow tied rank 
> ballots,
> and it may be equally undefined how such ballots will be counted.
>
> Instead I added a subcategory "Sequential rounds" to connect methods 
> that
> have sequential counting.
>
> I was unsure about MCA under "Ratings" since it has no article written 
> about
> it, but put it in a "Multiple round" category based on a one-line
> description.
>
> Comments or suggestions are welcome.
>
> Sincerely,
> Tom Ruen
>
> P.S. I added a quick listing for those (nonparty vote) at the end 
> under (B),
> but I'm less satisfied there, and I prefer "Majority/plurality" versus
> "SemiPR" versus "PR" as the broad categories.
>
> ***********************
> (A) Single Winner Systems
>
> Single Winner systems can be classified by how a vote is cast:
>
>     1 '''One Choice Voting''' A valid vote offers a single most 
> supported
> candidate.
>     2 '''Ranked choice Voting''' A valid vote can rank candidates 
> 1,2,3...
> (Tied rankings may permitted in some methods)
>     3 '''Rated Value Voting''' A valid vote allows numerical
> values/categories to be associated with each candidate. Every 
> candidate can
> be scored independent of the competition. (The set of valid
> values/categories is limited.)
>
> They can also be classified on how many times votes can be counted. 
> Methods
> like Plurality, Borda, and Approval with single counting rounds are 
> simpler
> since voters can be sure to know how their votes will be applied.
>
> 1. One Choice Voting methods
>     FPTP
>     Sequential rounds
>         Runoff voting
>         Elimination runoff
>         Exhaustive runoff
>     Random ballot
>
> 2. Ranked Choice Voting methods
>     Borda count
>     Sequential rounds
>         Instant Runoff Voting/Alternative Vote/Preference voting (IRV)
>             Supplementary Vote - reduced IRV process (2 rankings, 2 
> rounds)
>         Coombs' method
>         Bucklin voting
>     Condorcet method (Parallel pairwise rounds)
>         Ranked Pairs
>         Cloneproof Schwartz Sequential Dropping (CSSD)
>         Copeland's method
>         Ranked Majority Defeat Disqualification (DMDD)
>
> 3. Rated Value Voting methods
>     Approval voting
>     Cardinal Ratings (CR)
>     Multiple rounds:
>         Majority Choice Approval (MCA)
> .............................
>
> QUICKLY CONSIDERED MULTIPLE WINNER METHODS
>
> (B) Multiple Winner elections (not party-list)
>     One Vote per Winner (W votes)
>         Bloc voting/Plurality-at-large
>     Less than One Vote per Winner (<W votes)
>         Limited Voting (LV)
>     One Single Vote (1 vote)
>         Single Nontransferable Vote (SNTV)
>     One Distributed Vote (1 vote manually split among candididates)
>         Cumulative Voting (CV)
>         Equal&Even Cumulative Voting (E&E CV) - vote for N candidates, 
> each
> gets 1/N votes.
>     Ranked Choice Voting (1 vote automatically split among candidates 
> using
> rank ballot)
>         Single Transferable Vote (STV)
>
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