Truncation: Difference between revisions

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(Created page with "Truncation is when a voter votes honestly, but doesn't show some of their lower preferences. In the extreme case, it becomes bullet voting, where the voter only indicates thei...")
 
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Truncation is when a voter votes honestly, but doesn't show some of their lower preferences. In the extreme case, it becomes bullet voting, where the voter only indicates their [[1stfirst choicepreference]]. It is often done for [[Strategic voting]] purposes.
 
== Notes ==
A variant of the [[Participation criterion]] or [[Independence of Irrelevant Ballots]] offers one way of justifying [[ScoreRange voting]] being no worse than [[FPTP]]: voters can never be hurt by casting an FPTP-style vote ([[bullet voting]]) relative to not voting. Many other voting methods, such as [[IRV]] and [[STAR]] (and possibly [[Condorcet]] fail even this weaker version of Participation. Example for IRV:
 
{{ballots|
30+2: A>B
31: B
49: C
}}
 
If 2 of the 32: A>B voters show up and bullet vote A, then B is eliminated and then C wins. But if they don't vote, then A is eliminated and then B wins.
31 B
 
[[Category:Voting theory]]
49 C
 
If 2 of the 32 A>B voters show up and bullet vote A, then B is eliminated and then C wins. But if they don't vote, then A is eliminated and then B wins.
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