[EM] Majority Choice Approval and Bucklin
atarr at purdue.edu
Wed Feb 19 22:34:19 PST 2003
Something I've been wondering about... has anyone suggested extending the
gradation in MCA beyond preferred, approved, and diapproved? For example,
why not use MCA with a A,B,C,D,F ballot? If no candidate has a majority of
A's, then check for a majority of A's and B's, then check for a majority of
A's, B's, and C's, and finally just elect the candidate with the most A's,
B's, C's, and D's.
It seems like an obvious point, but I haven't actually seen any messages
advocating it. Call it "extended MCA" or "unconstrained Bucklin" or
"Approval Bucklin" or "Bucklin done right" or "bubble up approval" or whatever.
At 10:06 PM 2/19/2003 -0800, Alex Small wrote:
>Venzke Kevin said:
> > Can someone tell me how this differs from Bucklin
> > (with two rankings permitted)? It seems similar to
> > me, but doesn't Bucklin suffer from severe strategy
> > problems?
>Equal rankings are permitted. In that sense it is different from Bucklin.
> You can rate two candidates as Preferred rather than one, so it passes
>the weak FBC. You can rate one candidate as Preferred and all others as
>unacceptable, so that you aren't _forced_ to support an additional
>candidate when nobody gets a first-place majority.
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