“RCV” is combined branding for IRV (single winner) and STV (multi-winner). So it clearly doesn’t refer to Borda count. (I personally hate the “RCV” terminology, because it sounds as if it should include things like Borda count, while blurring the important distinction between IRV and STV. But that battle is pretty much lost right now.)
PAD voting is not “susceptible to the problems with Borda counts”, if by that you mean the issue with encouraging burial strategy and thus leading to a “dark horse” winner who prospers precisely because nobody expects them to. The Gibbard-Satterthwaite theorem shows that no voting method (with more than 2 candidates and more than 2 voters, and with the exception of dictatorship/random-ballot) is strategy-free, but in PAD the main possible strategies in practice are “free riding” (rating candidates lower if you expect them to win without your vote), and in PAD that’s risky and self-limiting. I expect that in practice most voters would be risk-averse and expressivity-seeking enough to vote honestly in PAD.
Mostly agree, but a couple of notes:
“RCV” is combined branding for IRV (single winner) and STV (multi-winner). So it clearly doesn’t refer to Borda count. (I personally hate the “RCV” terminology, because it sounds as if it should include things like Borda count, while blurring the important distinction between IRV and STV. But that battle is pretty much lost right now.)
PAD voting is not “susceptible to the problems with Borda counts”, if by that you mean the issue with encouraging burial strategy and thus leading to a “dark horse” winner who prospers precisely because nobody expects them to. The Gibbard-Satterthwaite theorem shows that no voting method (with more than 2 candidates and more than 2 voters, and with the exception of dictatorship/random-ballot) is strategy-free, but in PAD the main possible strategies in practice are “free riding” (rating candidates lower if you expect them to win without your vote), and in PAD that’s risky and self-limiting. I expect that in practice most voters would be risk-averse and expressivity-seeking enough to vote honestly in PAD.