Allocated Score: Difference between revisions
Full rewrite for clarity from the 0-5 Star Proportional Research Committee, including Keith Edmonds, and Sara Wolk following the approval of this method as the Equal Vote Coalition's recommendation for Proportional STAR.
(→Procedure: changed "rounds" to "round's") |
(Full rewrite for clarity from the 0-5 Star Proportional Research Committee, including Keith Edmonds, and Sara Wolk following the approval of this method as the Equal Vote Coalition's recommendation for Proportional STAR.) |
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[[Allocated Score]] is a sequential [[Multi-Member System|Multi-Winner]] [[Cardinal voting systems|Cardinal voting system]] using [[Score Voting|5 star ballots]]. Its public branding is ''Proportional STAR'' (Score Then Automatic Runoffs.) This branding is intended to align with[[Single-member district | single-winner]] [[STAR voting]].
Allocation is the default method of
==Procedure==
Each voter scores all candidates on a [0,5] scale
# Select the candidate with the highest sum of score as
# Set the ballot weight to zero for the [[
#* If several voters have contributed the same score to the winner at the threshold of the
# Repeat this process until all the seats are filled.
[[Fractional Surplus Handling]]: When determining which ballots belong to a winner's quota, voter’s ballots are sorted by the score they contributed to the winner's total score.
When multiple voters contributed the same score to the winner it may be the case that allocating them all to the winner would cause the quota to be exceeded but not allocating them all would cause the quota not to be met. For these voters on the cusp, an equal fraction of their ballot weight is allocated.
Fractional Surplus Handling ensures that voters who supported a candidate equally will be treated equally, while ensuring that the total weight of the ballots allocated for each winner will not exceed the Hare quota. It also preserves the [[Independence of irrelevant alternatives|Independence of Irrelevant Alternatives]] and [[Monotonicity]] criteria.
Note that with Fractional Surplus Handling voters can have a fractional ballot weight and they can subsequently only contribute that fraction to the remaining candidates, both during subsequent score tabulation and allocation.
==Python Implementation==
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