On Oct 23, 2010, at 6:15 PM, Michael Rouse wrote:
It's probably already been discussed before (most likely with a more
descriptive name), but the election methods list has been quiet, so...
Has anyone looked at making a ranked list of candidates -- either
by number of first place votes, as in IRV, or Borda order, as in
Nanson/Baldwin -- and dropping candidates in a binary rather than
unary way?
By way of example, in Instant Runoff Voting, you see if a candidate
has a majority. If not, you drop the lowest candidate. If there is
still no candidate, you drop the next lowest candidate, and so on.
With five candidates, you have something like this:
..... First round (no one dropped)
....1 Second round (one person dropped, ballots redistributed)
...11 Third round (two people dropped, ballots redistributed)
..111 Fourth round (three people dropped, ballots redistributed)
(for five candidates, three drops are sufficient)
It's a method analogous to a unary counting system.
i don't get it. how is this different from IRV? if you're dropping
them on the basis of number of first place votes, it's IRV. if it's
on some other basis, well, it's different in a quantitative way. if
it's Bottom-Two-Runoff-IRV, then it's Condorcet compliant. isn't it
all IRV, but with different rules for selecting the candidates you keep?
--
r b-j [email protected]
"Imagination is more important than knowledge."
----
Election-Methods mailing list - see http://electorama.com/em for list info
