Single Transferable Vote STV (Preferential Voting). Sometimes used when more than one option(candidate) is to be selected. STV. First proposed by Thomas Hare (English barrister) and Carl Andrae (Danish mathematician) in the 1850’s.
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Sometimes used when more than one option(candidate) is to be selected.
How does it work?
Suppose that we have 4 seats to fill on a local governing board, and that 50,000 votes are cast with 10 candidates running.
Voters will use ordinal ballots to rank all 10 candidates.
votes. So we set the
quota at votes.
Int means ‘ignore any remainder’.
Suppose candidate A gets 900 more votes than the quota of 10,001.
Suppose candidate B was second on 30% of the ballots having A first, C was second on 42% and D second on 28% of those ballots. Then we would distribute 30% of 900 = .30(900) = 270 votes to B, 42% of 900 = .42(900) = 378 votes to C and 28% of 900 = .28(900) = 252 votes to D!
Winston, Nadia—conservative, Winston more so
Theo, Rudy—liberal, Rudy more so