Given a vote where voters rank options in order of preference, a Condorcet loser is an option that loses all of its pairwise comparisons. Any election method conforming to the Condorcet criterion is known as a Condorcet method. ...

In other words, when faced with a choice between the Condorcet loser L and any other option O, the number of voters who prefer O to L is greater than the number of voters who prefer L to O.

Voting systems that never choose a Condorcet loser pass the Condorcet loser criterion. Voters at the voting booths in the US in 1945 Voting systems are methods (algorithms) for groups of people to select one or more options from many, taking into account the individual preferences of the group members. ...

Complying/noncomplying methods

Instant runoff voting, Borda count, Schulze method, and ranked pairs pass the Condorcet loser criterion. When the single transferable vote voting system is applied to a single-winner election it is sometimes called instant-runoff voting (IRV), as it is much like holding a series of runoff elections in which the lowest polling candidate is eliminated in each round until someone receives majority vote. ... The Borda count is a voting system used for single-winner elections in which each voter rank-orders the candidates. ... The Schulze method is a voting system developed in 1997 by Markus Schulze that selects a single winner using votes that express preferences. ... Ranked Pairs (RP) or Tideman (named after Nicolaus Tideman) is a voting method that selects a single winner using votes that express preferences. ...

Plurality voting, approval voting, range voting, minimax, and Bucklin voting fail the Condorcet loser criterion. The first-past-the-post electoral system is a voting system for single-member districts, variously called first-past-the-post (FPTP or FPP), winner-take-all, plurality voting, or relative majority. ... Approval voting is a voting system used for elections, in which each voter can vote for as many or as few candidates as the voter chooses. ... Range voting (also called ratings summation, or average voting, or cardinal ratings, or 0-99 voting, or the score system or point system) is a voting system used for single-seat elections. ... Minimax is often considered to be the simplest of the Condorcet methods. ... Bucklin is a voting system that can be used for single-member districts and also multi-member districts. ...

Politics is a process by which collective decisions are made within groups. ...

See also

• Condorcet method
• Condorcet criterion
• Voting system

Any election method conforming to the Condorcet criterion is known as a Condorcet method. ... The Condorcet candidate or Condorcet winner of an election is the candidate who, when compared in turn with each of the other candidates, is preferred over the other candidate. ... Announcement of elections in Brunate (near Como), Italy A voting system is a process that allows a group of individuals to choose between a number of options, and determines the preferred or winning option based on the number of votes each option receives. ...

External links

• Electoral methods: standards and criteria by Blake Cretney
• Voting methods: definitions and criteria by James Green-Armytage