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Preferential voting or preference voting (PV) may refer to different election systems or groups of election systems: Any electoral system that allows a voter to indicate multiple preferences where preferences marked are weighted or used as contingency votes (any system other than plurality or anti-plurality )
Depending on how "preferential" is defined, the term would include all voting systems, apply to any system that uses ranked ballots (thus both instant-runoff voting and single transferable vote), or would exclude instant-runoff voting (instant-runoff voting fails positive responsiveness because ballot markings are not interpreted as ...
Ranked-choice voting (RCV), preferential voting (PV), or the alternative vote (AV), is a multi-round elimination rule based on first-past-the-post. In academic contexts, the system is generally called instant-runoff voting ( IRV ) to avoid conflating it with other methods of ranked voting in general.
In a voting system that uses multiple votes (Plurality block voting), the voter can vote for any subset of the running candidates. 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 ...
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.
Instant-runoff voting is based on the Single Transferable Vote electoral system, developed by Hill in 1819, Hare in 1857, and Andrae in 1855. Unlike IRV, the Single Transferable Vote was designed as a form of proportional representation involving multi-seat constituencies, while IRV is a majoritarian method, where minority sentiment goes un ...
In political science, parallel voting or superposition refers to the use of two or more electoral systems to elect different members of a legislature. More precisely, an electoral system is a superposition if it is a mixture of at least two tiers, which do not interact with each other in any way; one part of a legislature is elected using one method, while another part is elected using a ...
The Australian Senate voting reform of 2016 switched from full preferential voting to optional preferential voting. A minimum number is specified in the instructions on the ballot paper. Since in the past a single number '1' above the line was valid, that is still a formal vote even though voters are encouraged to rank six candidates.