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  2. Voting criteria - Wikipedia

    en.wikipedia.org/wiki/Voting_criteria

    It is a common property in the plurality-rule family of voting systems. For example, say a group of voters ranks Alice 2nd and Bob 6th, and Alice wins the election. In the next election, Bob focuses on expanding his appeal with this group of voters, but does not manage to defeat Alice—Bob's rating increases from 6th-place to 3rd.

  3. Approval voting - Wikipedia

    en.wikipedia.org/wiki/Approval_voting

    Most of the mathematical criteria by which voting systems are compared were formulated for voters with ordinal preferences. In this case, approval voting requires voters to make an additional decision of where to put their approval cutoff (see examples above). Depending on how this decision is made, approval satisfies different sets of criteria.

  4. Comparison of voting rules - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_voting_rules

    Some voting rules are difficult to explain to voters in a way they can intuitively understand, which may undermine public trust in elections. [8] [failed verification] For example, while Schulze's rule performs well by many of the criteria above, it requires an involved explanation of beatpaths. Ease of voting.

  5. List of electoral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_electoral_systems

    An electoral system (or voting system) is a set of rules that determine how elections and referendums are conducted and how their results are determined.. Some electoral systems elect a single winner (single candidate or option), while others elect multiple winners, such as members of parliament or boards of directors.

  6. Voting - Wikipedia

    en.wikipedia.org/wiki/Voting

    So, a voter might vote for Alice, Bob, and Charlie, rejecting Daniel and Emily. Approval voting uses such multiple votes. In a voting system that uses a ranked vote, the voter ranks the candidates in order of preference. For example, they might mark a preference for Bob in the first place, then Emily, then Alice, then Daniel, and finally Charlie.

  7. Condorcet winner criterion - Wikipedia

    en.wikipedia.org/wiki/Condorcet_winner_criterion

    Instant-runoff does not comply with the Condorcet criterion, i.e. it is possible for it to elect a candidate that could lose in a head to head contest against another candidate in the election. For example, the following vote count of preferences with three candidates {A, B, C}: A > B > C: 35; C > B > A: 34; B > C > A: 31

  8. Majority winner criterion - Wikipedia

    en.wikipedia.org/wiki/Majority_winner_criterion

    Approval voting trivially satisfies the majority criterion: if a majority of voters approve of A, but a majority do not approve of any other candidate, then A will have an average approval above 50%, while all other candidates will have an average approval below 50%, and A will be elected.

  9. Instant-runoff voting - Wikipedia

    en.wikipedia.org/wiki/Instant-runoff_voting

    The 1990 Irish presidential election provides a simple example of how instant-runoff voting can produce a different result from first-past-the-post voting and prevent some spoiler effects associated with plurality voting. The three major candidates were Brian Lenihan of Fianna Fáil, Austin Currie of Fine Gael, and Mary Robinson of the Labour ...