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Technical discussion of election methods

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Minimal Tweak to make BTR-IRV Landau Efficient

FS
Forest Simmons
Fri, Apr 14, 2023 2:23 AM

To make sure BTR-IRV can never elect a covered candidate, use this tweak:

  1. Let C be the pairwise loser of the matchup between the two (demaining)
    candidates with the fewest transferred votes.
  2. Eliminate C and every candidate covered by C if any exists.
  3. Repeat steps 1 and 2 until there is an undefeated candidate among the
    uneliminated ones ... and then elect that candidate.
To make sure BTR-IRV can never elect a covered candidate, use this tweak: 1. Let C be the pairwise loser of the matchup between the two (demaining) candidates with the fewest transferred votes. 2. Eliminate C and every candidate covered by C if any exists. 3. Repeat steps 1 and 2 until there is an undefeated candidate among the uneliminated ones ... and then elect that candidate.