Electoral system: Difference between revisions
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== Criteria in evaluating voting systems == |
== Criteria in evaluating voting systems == |
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Various criteria are used in evaluating voting systems. However, it is impossible for one voting system to pass all criteria in common use. For example, [[Arrow's impossibility theorem]] demonstrates that the following criteria are mutually contradictory: |
Various criteria are used in evaluating voting systems. However, it is impossible for one voting system to pass all criteria in common use. For example, [[Arrow's impossibility theorem]] demonstrates that the following criteria are mutually contradictory for an [[Ordinal voting]] system: |
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* The voting system should always give a result |
* The voting system should always give a result |
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*[[Proportional representation|Proportionality]] |
*[[Proportional representation|Proportionality]] |
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*Simplicity - speed |
*Simplicity - speed |
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*Resistance to |
*Resistance to [[Tactical voting]] |
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*Resistance to [[Vote splitting]] |
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*Reduction of potential for dispute after the fact |
*Reduction of potential for dispute after the fact |
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*Reduction of potential for fraud |
*Reduction of potential for fraud |