Condorcet paradox

E278103

The Condorcet paradox is a voting theory phenomenon where collective preferences can become cyclic and inconsistent, even when individual voters’ preferences are perfectly rational and transitive.

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Predicate Object
instanceOf social choice theory concept
voting paradox
assumes individual preferences are complete and transitive
category Condorcet paradox self-linksurface differs
surface form: Paradoxes in social choice

Voting theory paradoxes
contrastsWith transitive social preference orderings
describes cyclic collective preferences
intransitive social preference orderings
majority preference cycles
exampleOf collective choice paradox
preference aggregation paradox
field social choice theory
voting theory
formalizedBy pairwise majority relation
illustrates difficulty of achieving consistent social choices
limitations of simple majority rule
implies collective preferences can be intransitive
majority rule can be inconsistent
social preference cycles can arise from transitive individual preferences
involves pairwise majority voting
rational individual preferences
transitive individual preference orderings
motivated development of alternative voting systems
research on strategy-proof voting rules
namedAfter Marquis de Condorcet
occursWhen at least three alternatives are considered
pairwise majority preferences form a cycle
relatedTo Arrow’s impossibility theorem
surface form: Arrow's impossibility theorem

Condorcet winner
majority rule
preference aggregation
social welfare function
voting cycles
shows aggregation of preferences can violate transitivity
collective rationality can fail
majority rule may fail to produce a Condorcet winner
typicalExample A is preferred to B, B is preferred to C, and C is preferred to A by majority
usedIn analysis of voting rules
design of electoral systems
political science
theoretical economics

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Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Marquis de Condorcet knownFor Condorcet paradox
Arrow’s impossibility theorem relatedTo Condorcet paradox
Condorcet paradox category Condorcet paradox self-linksurface differs
this entity surface form: Paradoxes in social choice