[EM] Majority Choice Approval and Bucklin
fsimmons at pcc.edu
Thu Feb 20 10:56:46 PST 2003
In the main version of MCA, the fifty percent plus of voters is only
needed for electing a candidate on the basis of favorite status. In other
words, if no candidate has favorite status on more than fifty percent of
the ballots, then the candidate with the most approval is elected, even if
no candidate has fifty percent approval.
The idea of MCA was to minimally extend Approval to allow instrumental
expression (not just token expression) of favorite.
On Thu, 20 Feb 2003, [iso-8859-1] Venzke Kevin wrote:
> It occurs to me that on any stage of evaluation, more
> than one candidate could have a "majority." That
> makes it seem a little arbitrary to have to say, "If
> someone has a majority *and* it's the largest
> majority, stop processing." Also, since the
> majorities could overlap, it is more obviously
> artificial than an IRV majority.
> Just thoughts.
> --- Adam Tarr <atarr at purdue.edu> a écrit : >
> 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.
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