Electoral system: Difference between revisions
Removed "Broadness criterion" which isn't defined anywhere, and removed some rarely used acronyms too
(→See also: Minor touchups on the categories on the bottom of the page) |
(Removed "Broadness criterion" which isn't defined anywhere, and removed some rarely used acronyms too) |
||
| (4 intermediate revisions by 4 users not shown) | |||
Line 39:
See [[ballot]].
Different voting systems have different forms for allowing the individual to express their [[tolerances versus preferences|tolerances or preferences]]. In [[ranked ballot]] or "preference" voting systems, like [[instant-runoff voting]], the [[Borda count]], the Modified Borda count MBC or a [[Condorcet method]], voters order the list of options from most to least preferred. In [[range voting]], voters rate each option separately. In [[first-past-the-post]] (also known as plurality voting), voters select only one option, while in [[approval voting]], they can select as many as they want. In voting systems that allow [[plumping]], like [[cumulative voting]], voters may vote for the same candidate multiple times.
<br />
Line 68:
* The voting system should always give a result
*Removing a candidate should not change the winner of an election unless that candidate is the winner ([[independence of irrelevant alternatives]])
*Non-dictatorship (i.e. more than one person's vote matters)
Line 76 ⟶ 74:
*[[Proportional representation|Proportionality]]
*Simplicity — both for the voters, and for the people counting the votes
*Resistance to [[Tactical voting]]
*Resistance to [[Vote splitting]]
*Reduction of potential for dispute after the fact
*Reduction of potential for fraud
*[[Monotonicity criterion]]
*[[Consistency Criterion]]
*[[
*[[Generalized Condorcet
*[[Strategy-Free criterion]] (SFC)
*[[Generalized Strategy-Free criterion]] (GSFC)
Line 91 ⟶ 88:
*[[Weak Defensive Strategy criterion]] (WDSC)
*[[Favorite Betrayal criterion]] (FBC)
*[[Participation criterion]]
*[[Summability criterion]]
=== Utility ===
Line 136 ⟶ 133:
****[[Schulze method|Schulze]], which is also known as "Beatpath Method" or "Cloneproof Schwartz Sequential Dropping"
****[[Copeland's method]]
****Dodgson-Hare [https://jamesgreenarmytage.com/dodgson.pdf] Under some assumptions very resistant to strategies
***[[Bucklin voting]]: approval with virtual runoff; each voters' ballot is counted for more candidates each round until some candidate reaches a majority
*[[Cardinal Voting]]: voting A valid vote allows independent numerical values to be associated with each candidate. (The set of valid values is limited. So it's usually voting on a scale of, say, 0 to 5)
| |||