The BBC reports that there is a debate in Jersey about a possible change in the island’s electoral system. “Deputy Montfort Tadier wants to introduce a mixture of single transferable and alternative vote systems.”
Of course, that actually would be the same system, but a mixture of district magnitudes. Single transferable vote (STV) simply reduces to alternative vote (AV) when moving from any magnitude greater than one to a single-seat district.
The article further notes that “Jersey currently has a mix of single and multi-member constituencies” and that “Jersey currently uses the first-past-the-post system, for all elections.”
It is interesting that when the rule for determining winners is plurality (first past the post), it is considered the same system, independent of magnitude. Yet when referring to a rule of transferable votes, applications to M=1 (single-seat district) and M>1 (multiseat district) are considered different “systems”.
Further, the article attempts to clarify: “The single-transferable-vote means a vote could be transferred to a second preference if the first does not succeed.” Yes, and so does the alternative vote, which is defined next as being “where candidates are ranked in order of preference.” Yes, and so is the single transferable vote.