Arrow's impossibility theorem
id:
arrow-s-impossibility-theorem-189-1758089
title:
Arrow's impossibility theorem
text:
Arrow's impossibility theorem is a key result in social choice, discovered by Kenneth Arrow, showing that no ranked voting rule can behave rationally. Specifically, any such rule violates independence of irrelevant alternatives (IIA), the idea that a choice between A and B should not depend on the quality of a third, unrelated option C. The result is most often cited in election science and voting theory, where C is called a spoiler candidate. In this context, Arrow's theorem can be restated as
brand slug:
wiki
category slug:
encyclopedia
description:
Proof all ranked voting rules have spoilers
original url:
https://en.wikipedia.org/wiki/Arrow%27s_impossibility_theorem
date created:
2002-09-22T18:02:12Z
date modified:
2024-09-09T04:11:20Z
main entity:
{"identifier":"Q33481","url":"https://www.wikidata.org/entity/Q33481"}
image:
fields total:
13
integrity:
15