FAIR-V: Difference between revisions
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Aldo Tragni (talk | contribs) (Simplified section on strategies) |
Aldo Tragni (talk | contribs) (Procedure simplified) |
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[[File:FAIR-V Procedure.svg|500px|thumb|right|FAIR-V Procedure]] |
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First-Approval Instant-Runoff Voting (FAIR-V) is a [[Single Member system|Single-Winner]] [[Cardinal voting systems]] |
First-Approval Instant-Runoff Voting (FAIR-V) is a [[Single Member system|Single-Winner]] [[Cardinal voting systems]] proposed by [[User:Aldo Tragni|Aldo Tragni]]. |
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The objectives of this voting system is the balance between simplicity, resistance to strategies, and elect the utilitarian winner. |
The objectives of this voting system is the balance between simplicity, resistance to strategies, and elect the utilitarian winner. |
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==Procedure== |
==Procedure== |
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Ballot use range [0,3]. |
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Voter score candidates with ratings in [0,3]. Set -1 points to the lowest ratings in each vote (0 to all others). |
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Eliminate the candidate considered worst by the most voters. |
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# The candidate with the lowest sum of points is eliminated (if in a single vote all candidates with -1 are eliminated, then the remaining candidates with the lowest rating will be set to -1). |
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The above elimination is repeated until only one candidate is left, who is the winner. |
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''Note: worst candidates for a voter are those (among the remaining) with the lowest rating in his ballot.'' |
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===Normalization=== |
===Normalization=== |
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Bullet Min Norm: set -1 the minimum value of the ballot to normalize, and the others all to 0. |
Bullet Min Norm (B-Min Norm): set -1 the minimum value of the ballot to normalize, and the others all to 0. |
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The actual FAIR-V algorithm uses the B-Min Norm and eliminate the candidate with the lowest point sum. |
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B-Min Norm, and also FAIR-V, is applicable also to ranges with more than 4 ratings. |
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===Name derivation=== |
===Name derivation=== |
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A big difference between the 2 types of counting is that in FAIR-V the failure of monotonicity is practically absent, while [[IRV]] is one of the systems in which it's most present. |
A big difference between the 2 types of counting is that in FAIR-V the failure of monotonicity is practically absent, while [[IRV]] is one of the systems in which it's most present. |
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===[[ |
===[[Coombs]]=== |
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Use ranked votes instead of range [0,3] and win the candidate with the absolute majority, if there is after an elimination. |
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FAIR-V is more resistant to strategies, but has a more complex procedure than [[PRO-V]]. |
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==References== |
==References== |
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