Multi-winner Condorcet, vs STV
Ian Jackson
ijackson at chiark.greenend.org.uk
Tue Dec 8 17:02:16 UTC 2009
Um, I forgot to change some of my threes to fours, in my example:
If we imagine a polarised election, where there are four candidates on
one side A B C D and four candidates on the other side W X Y Z, and
four seats, and every ballot is either an ABCD-ballot (ranks every
ABCD above every WXYZ) or an WXYZ-ballot (ranks every WXYZ above every
ABCD) then a bare majority of ABCDs over WXYZs will get all four of
their candidates elected. This would be quite unfair; a better result
would be to elect two of A B C D and two of W X Y Z.
Ian.
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