[EM] IRV vs Condorcet - a challenge
daniel-j-bishop at neo.tamu.edu
Mon Jun 12 21:36:45 PDT 2006
Dave Ketchum wrote:
> Permitting equal ranking for multiple candidates. Desirable for
> pleasing those who call Approval desirable; doable with Condorcet, though
> there can be arguments as to counting' Not doable as practical for IRV
> (explain how if you disagree).
Some simple ways of dealing with equal rankings in IRV/STV are:
(1) "Transferrable Cumulative Vote" - If there are N top-ranked
non-eliminated candidates on a ballot, then each candidate receives 1/N
of a vote. (This is what I used in my STV-CLE calculator.)
(2) "Transferrable Approval Vote" - Each top-ranked non-eliminated
candidate on a ballot receives 1 vote.
(3) Convert every ballot into a fully-ranked one by breaking ties at random.
More information about the Election-Methods