Pareto efficiency: Difference between revisions

Pareto efficiency (view source)

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Removing "rename" banner suggesting the move to "Pareto efficiency", and clarifying the introduction a bit

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Revision as of 04:10, 10 September 2022 (view source) RobLa (talk \| contribs) m (RobLa moved page Pareto criterion to Pareto efficiency over redirect: Matching up with w:Pareto efficiency) ← Older edit		Revision as of 04:27, 10 September 2022 (view source) RobLa (talk \| contribs) (Removing "rename" banner suggesting the move to "Pareto efficiency", and clarifying the introduction a bit) Newer edit →
Line 1: ~~{{rename\|from=Pareto criterion\|to=Pareto efficiency}}~~ {{wikipedia\|Pareto efficiency}} ~~The~~'''Pareto efficiency''' (frequently referred to as the "'''Pareto criterion'''" or ~~unanimity~~"'''Unanimity criterion'''" in the [[election method]] context) is a basic criterion for evaluating [[voting system\|voting systems]]. It can be defined in this way: {{definition\|If every voter prefers alternative X over alternative Y, then the ~~system~~election method prefers X over Y}} This criterion is important in the context of [[Arrow's impossibility theorem]], since it was one of Arrow's criteria in the theorem. Virtually every devised election method satisfies this criterion. An example of a method which would fail it would be ''Random Candidate'', where some candidate is elected at random, regardless of the submitted votes.