Honesty criterion: Difference between revisions
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Given an honest vote and the respective tactical vote, different from each other, a voting system satisfies the Honesty criterion when, during the count, it's valid that: |
Given an honest vote and the respective tactical vote, different from each other, a voting system satisfies the Honesty criterion when, during the count, it's valid that: |
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- in the Update Steps the tactical vote reduces or keep the deviation from the respective honest vote. |
- in the Update Steps the tactical vote reduces or keep the deviation from the respective honest vote (it's weak, if this point isn't satisfied). |
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The verification consists of applying the changes made on the tactical vote, during Update Step, also to the honest vote and then comparing how much they differ from each other. |
The verification consists of applying the changes made on the tactical vote, during Update Step, also to the honest vote and then comparing how much they differ from each other. |
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To satisfy this criterion it's necessary to make assumptions about the form of the tactical vote obtained from the honest one. |
To satisfy this criterion it's necessary to make assumptions about the form of the tactical vote obtained from the honest one. |
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Even if the criterion is met, it's still necessary to evaluate how much is the deviation from the honest vote before and after the Update Step and how much it affects the result. |
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===Perfect Honesty criterion=== |
===Perfect Honesty criterion=== |
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A voting system satisfies the Perfect Honesty criterion when the first |
A voting system satisfies the Perfect Honesty criterion when the first Update Step of the count is the Honesty Step. |
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===Positive effects=== |
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- It reduces the negative effects of tactical votes, that are hypothesized by the voting system, when this criterion is satisfied. |
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- It can drastically reduce the negative effects of [[IIA]] failure. |
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===Not meet criterion=== |
===Not meet criterion=== |
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* [[IRV]] (there isn't always a Honesty Step) |
* [[IRV]] (there isn't always a Honesty Step) |
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===Honesty Step only in end=== |
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* [[STAR]] and similar with "automatic runoff" (before the runoff, which is the Honesty Step, the votes are totally tactical, and therefore manage to damage the result anyway). |
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===Meet criterion=== |
===Meet criterion=== |
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Some systems that meet Honesty criterion, under certain assumptions, are: |
Some systems that meet Honesty criterion, under certain assumptions, are: |
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* [[IRNR]] (like Distributed Voting) |
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* [[Distributed Voting#Tactical vote resistance|Distributed Voting]] |
* [[Distributed Voting#Tactical vote resistance|Distributed Voting]] |
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* [[Distributed Multi-Voting#Tactical_vote_resistance|Distributed Multi-Voting]] (closest to the Perfect Honesty criterion). |
* [[Distributed Multi-Voting#Tactical_vote_resistance|Distributed Multi-Voting]] (closest to the Perfect Honesty criterion). |