[EM] Majority Choice Approval and Bucklin

Adam Tarr 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.

For more information about this list (subscribe, unsubscribe, FAQ, etc), 
please see http://www.eskimo.com/~robla/em

More information about the Election-Methods mailing list