[EM] Better Choices for Democracy
Kristofer Munsterhjelm
km-elmet at munsterhjelm.no
Tue Jun 24 10:07:50 PDT 2025
On 2025-06-19 23:12, Ralph Suter via Election-Methods wrote:
> You've oversimplified what they advocate. Their website says:
>
>
> "In almost all large-scale elections, the process of comparing pairs of
> candidates will identify the Consensus Choice, a single candidate who
> wins all their head-to-head matchups. In the unlikely event that no
> Consensus Choice exists, the ultimate winner can be determined by one of
> the following resolution methods:
>
> "Margin of Loss Resolution: If there is no Consensus Choice, the
> candidate whose largest head-to-head loss is smallest is declared the
> winner.
>
> "Number of Wins & Margin of Loss Resolution: The candidate with the
> most head-to-head wins is declared the winner. In the event that
> multiple candidates tie for most head-to-head wins, the tie is broken in
> favor of the one whose largest head-to-head loss is smallest.
>
> "Instant Runoff Resolution: If there is no Consensus Choice,
> Instant Runoff Voting is used to determine the winner."
>
> My biggest question is why they included instant runoff as one of the
> resolution methods, especially because on their FAQ page, they explain
> why it isn't a good method:
> [snip]
The best explanation I can figure out is that they're going for absolute
simplicity. Minmax and Copeland have a reasonable claim to being as
simple as possible for (a pairwise matrix-based) Condorcet method; and
then Condorcet//IRV would be there as the simplest augmentation to IRV
that makes it Condorcet, for those jurisdictions that already use or are
familiar with IRV.
I agree that it's not ideal, though. As far as IRV hybrids go, I would
imagine Benham to have a stronger claim on retaining the desirable
aspects of Condorcet even in troublesome (cyclical) elections, since it
passes Smith; while not being all that much harder.
Something like:
"Instant Runoff Resolution: If there is no Consensus Choice among
candidates not eliminated, perform one step of Instant Runoff: eliminate
the first preference loser, and try again."
-km
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