[EM] Sequential-Pairwise offensive & defensive strategy?

[Forest Simmons]

So called BTR-IRV, "Bottom Two Runoff IRV" goes along those lines.

You probably remember "Benham" that runs IRV elimination until there
remains a candidate undefeated by any of the other remaining candidates.

This reminds me of basing the Sequential Pairwise Elimination agenda order
on Top preferences ... by using those preferences to "de-clone" the Borda
agenda order:

The agenda order is given by SB(X), the Sum over all ballots B of the first
place votes of the candidates ranked above X on B.

The larger SB(X), the later X is (on average) in the rankings, and the
rearlier X is in the elimination agenda.



On Wed, Sep 20, 2023, 4:56 AM Michael Ossipoff <email9648742 at gmail.com>
wrote:

> If, using voted rankings, Sequential-Pairwise’s comparison-order is
> determined by giving, to the candidates with higher top-count score, a
> later position in the comparison-order, so that voters don’t know what the
> comparison-order will be…
>
> …
>
> …& if voters’ knowledge of eachother’s preferences is no better than it is
> now in political-elections…
>
> …
>
> …Does that Sequential-Pairwise election have an offensive strategy with
> gain-expectation comparable to what it would have in MinMax, RP & CSSD?
>
>
>
> …And, if so, is there a defensive strategy to thwart or deter that
> offensive strategy?
>
>
>
> …That seems of interest because Sequential-Pairwise is so much less
> computationally-demanding than the other pairwise-count methods.
>
> If, using voted rankings, Sequential-Pairwise’s comparison-order is
> determined by giving, to the candidates with higher top-count score, a
> later position in the comparison-order, so that voters don’t know what the
> comparison-order will be…
>
> …
>
> …& if voters’ knowledge of eachother’s preferences is no better than it is
> now in political-elections…
>
> …
>
> …Does that Sequential-Pairwise election have an offensive strategy with
> gain-expectation comparable to what it would have in MinMax, RP & CSSD?
>
>
>
> …And, if so, is there a defensive strategy to thwart or deter that
> offensive strategy?
>
>
>
> …That seems of interest because Sequential-Pairwise is so much less
> computationally-demanding than the other pairwise-count methods.
> ----
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> info
>
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