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  2. Arrow's impossibility theorem - Wikipedia

    en.wikipedia.org/wiki/Arrow's_impossibility_theorem

    If is chosen as the winner, it can be argued any fair voting system would say should win instead, since two voters (1 and 2) prefer to and only one voter (3) prefers to . However, by the same argument A {\displaystyle A} is preferred to B {\displaystyle B} , and C {\displaystyle C} is preferred to A {\displaystyle A} , by a margin of two to one ...

  3. 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.

  4. Secret ballot - Wikipedia

    en.wikipedia.org/wiki/Secret_ballot

    The secret ballot, also known as the Australian ballot, [1] is a voting method in which a voter's identity in an election or a referendum is anonymous. This forestalls attempts to influence the voter by intimidation, blackmailing, and potential vote buying. This system is one means of achieving the goal of political privacy.

  5. Comparison of voting rules - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_voting_rules

    Multi-winner electoral systems at their best seek to produce assemblies representative in a broader sense than that of making the same decisions as would be made by single-winner votes. They can also be route to one-party sweeps of a city's seats, if a non-proportional system, such as plurality block voting or ticket voting, is used.

  6. Two-round system - Wikipedia

    en.wikipedia.org/wiki/Two-round_system

    The two-round system (TRS or 2RS), sometimes called ballotage, top-two runoff, or two-round plurality, [1] is a single-winner voting method involving two rounds by choose-one voting, where the voter marks a single favorite candidate. The two candidates with the most votes in the first round then move on to a second round.

  7. Symmetry (social choice) - Wikipedia

    en.wikipedia.org/wiki/Symmetry_(social_choice)

    In economics and social choice, a function satisfies anonymity, neutrality, or symmetry if the rule does not discriminate between different participants ahead of time. For example, in an election, a voter-anonymous function is one where it does not matter who casts which vote, i.e. all voters' ballots are equal ahead of time.

  8. Poisson game - Wikipedia

    en.wikipedia.org/wiki/Poisson_game

    In game theory and political science, Poisson games are a class of games often used to model the behavior of large populations. One common application is determining the strategic behavior of voters with imperfect information about each other's preferences. [1]

  9. Social choice theory - Wikipedia

    en.wikipedia.org/wiki/Social_choice_theory

    A social choice function, sometimes called a voting system in the context of politics, is a rule that takes an individual's complete and transitive preferences over a set of outcomes and returns a single chosen outcome (or a set of tied outcomes). We can think of this subset as the winners of an election, and compare different social choice ...