[EM] Fwd: U/P voting: new name for simple 3-level method.
cbenham at adam.com.au
Thu Sep 8 12:20:05 PDT 2016
On 9/9/2016 12:39 AM, Jameson Quinn wrote:
> The main advantage of U/P voting over other systems like MJ or MCA is
> simplicity of description. So I'm going to try to describe it as
> simply as possible.
> To vote, you rate each person running as "preferred", "acceptable", or
> "unacceptable". You can rate any number at each level.
> If more than half of voters rate a person "unacceptable", that person
> can't win, unless the same is true of all the people running. Of those
> remaining, the winner is the one rated "preferred" by the most voters.
C: By this definition, the U/P method uses a simple 3-slot ballot just
like MTA and MCA.
> C: Again, I'd be interested in seeing a plausible example of when
> U/P doesn't elect the Approval winner.
> 20: A>>B>C
> 35: B>A>>C
> 45: C>>A=B
> Threshold in approval is >>. In U/P, voters are as expressive as
> C: On 3-slot ratings ballots, how are the 20 A supporters able to vote
> one unapproved candidate above the other?
> On the 3-slot ballots, they vote A>B. On the 2-slot ballots, they vote
> A. These are perfectly consistent.
C: But above you are suggesting that U/P somehow uses a both a 2-slot
ballot and a 3-slot ballot. Which is it?
Actually it seems to me that the stripped-down 3-slot version (if
default rating is "Unacceptable") is actually the same method
as MTA. "Unacceptable" is just the inverse of "Approved". Any candidate
who doesn't get a majority "Unacceptable" score must
get a majority Approval score.
I prefer MTA's more positive wording. In U/P it seems as though the
middle rating slot doesn't do anything.
> Any candidate, including an incumbent, who had gotten over 50%
> "unacceptable" in the prior election would have a note to that effect
> next to their name on the ballot. (In prior messages, I'd suggested
> not allowing them on the ballot. I now think that allowing them on,
> but with a note, would be better.)
C: Yes, that is far less draconian, a big improvement, and not a big
deal. I suppose there's nothing wrong with a bit of history.
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