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The single transferable vote (STV) is a proportional representation system and ranked voting rule that elects multiple winners. Under STV, an elector's vote is initially allocated to their first-ranked candidate. Candidates are elected (winners) if their vote tally exceeds the electoral quota.
The single transferable vote (STV) or proportional-ranked choice voting (P-RCV) [a] is a multi-winner electoral system in which each voter casts a single vote in the form of a ranked ballot. Voters have the option to rank candidates, and their vote may be transferred according to alternative preferences if their preferred candidate is ...
In this way PR-STV provides Droop proportionality - an example STV election using the Droop quota method for 9 seats and with no exhausted preferences would guarantee representation to every distinct group of 10% of the voters, with at most just under 10% of the vote being wasted, not used to elect anyone.
(This is inspired by transferring ballots in STV, and reduces the chances of "wasted/sub-threshold" voting power. The vote linkage and seat linkage hybrid has been further refined by Markus Schulz, [ 21 ] where in the proposed system uses STV on the local tier, and the votes for the local winner are only counted as votes for that candidate's ...
For example, Ohio Republicans won about 55% of the vote in recent statewide elections so a proportionate map would favor Republicans in eight or nine of Ohio's 15 congressional districts ...
The two common ways compensation occurs are seat linkage compensation (or top-up) and vote linkage compensation (or vote transfer). [3] Like a non-compensatory mixed system, a compensatory mixed system may be based on the mixed single vote (voters vote for a local candidate and that vote is used to set the party share of the popular vote for the party that the candidate belongs to) or it may ...
An expanding approvals rule (EAR) is a rule for multi-winner elections, which allows agents to express weak ordinal preferences (i.e., ranking with indifferences), and guarantees a form of proportional representation called proportionality for solid coalitions. The family of EAR was presented by Aziz and Lee.
The ERS handbook on STV has advised against such variants since at least 1976, as they can cause problems with proportionality in small elections. [ 1 ] [ 18 ] In addition, it means that vote totals cannot be summarized into percentages , because the winning candidate may depend on the choice of unit or total number of ballots (not just their ...