Re: [EM] Majority Choice Approval and Bucklin

[Adam Tarr]

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.

-Adam

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.

Alex

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