Kemeny–Young Method

The Kemeny–Young method is a voting system that uses preferential ballots and pairwise comparison counts to identify the most popular choices in an election. It is a Condorcet method because if there is a Condorcet winner, it will always be ranked as the most popular choice.

This method assigns a score for each possible sequence, where each sequence considers which choice might be most popular, which choice might be second-most popular, which choice might be third-most popular, and so on down to which choice might be least-popular. The sequence that has the highest score is the winning sequence, and the first choice in the winning sequence is the most popular choice. (As explained below, ties can occur at any ranking level.)

The Kemeny–Young method is also known as the Kemeny rule, VoteFair popularity ranking, the maximum likelihood method, and the median relation.

Read more about Kemeny–Young MethodDescription, Example, Characteristics, Calculation Methods, History

Other articles related to "method":

Local Independence Of Irrelevant Alternatives - Voting Theory - Examples - Kemeny–Young Method
... This example shows that the Kemeny–Young method violates the Independence of irrelevant alternatives criterion. 3 A > B > C 2 B > C > A 2 C > A > B The Kemeny–Young method arranges the pairwise comparison counts in the following tally table All possible pairs of choice names Number of votes with indicated ...
Kemeny–Young Method - History
... The Kemeny–Young method was developed by John Kemeny in 1959 ... In 1978 Peyton Young and Arthur Levenglick showed that this method was the unique neutral method satisfying reinforcement and the Condorcet criterion ... model for these noisy signals, Young showed that the Kemeny–Young method was the maximum likelihood estimator of the true preference order ...
Later-no-harm Criterion - Examples - Kemeny–Young Method - Conclusion
... By hiding their later preferences about B and C, the three voters could change their first preference A from loser to winner ... Thus, the Kemeny-Young method fails the Later-no-harm criterion ...

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