The number of candidates if Final Five Voting were applied to STV

Voters’ ability/willingness to rank candidates is an issue in ranked-ballot systems. Final Five (Four) Voting (FFV) aims to solve this problem with a plurality winnowing round. Voters are asked to consider only five (four) candidates at the ranking stage. What does this look like in STV?

The minimum number of decisive-round candidates is district magnitude. It cannot be less than 5 in a 5-seat district. So, for two slates of 3 that run in a competitive 5-seat district, voters are asked to consider six options. (I chose that scenario because it feels like an equilibrium.)

This number grows or shrinks in response to the number of slates, the sizes of slates, the number of independents, and the number coming out of an FFV winnowing round.

Someone should make a graph.

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