[EM] Why I think IRV isn't a serious alternative

Greg greg at somervilleirv.org
Sun Dec 7 15:41:07 PST 2008

Abd ul-Rahman Lomax wrote:
> For the benefit of those who aren't familiar with the terminology,
> "Supplementary Vote" is top-two batch-elimination IRV. In the United
> States, there are or have been a few implementations of SV, and
> FairVote claims these as IRV successes.

That's not quite standard terminology, as I understand it. In the
"Supplementary Vote," voters may rank only two candidates. That's the
system used to elect the Mayor of London isn't currently in use in the
U.S. The top-two batch-elimination version of IRV, where voters rank
more than two, is called the "Contingent Vote." It's the Contingent
Vote, limited to three rankings, that has been implemented under the
name instance runoff in North Carolina.


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