[EM] MMPO vs PC
nkklrp at hotmail.com
Mon Jun 6 22:53:49 PDT 2005
First of all, thanks for the comments. Of course, lack of understanding of
the count has a lot to do with favorite-burial in a rank method. But the
beauty of MMPO is that its advocates can emphatically assure people that
there's absolutely no need for favorite-burial. Only a very few methods can
guarantee that. They include MMPO, t-matrix PC, Approval, and CR. That
property might be very valuable during the enaction campaign, but also very
important in subsequent elections if voters can be emphatically assured that
they never have reason to bury their favorite, so that maybe, if they all
hear it, and if they're convinced that it's true, they won't do so.
I agree that the properties met by the fancier wv methods, but not by PC,
aren't important enough to justify the fancier methods needed to get those
properties. Properties such as compliance with MMC and ICC.
Likewise for MMPO, whose special advantages far outweigh the loss of MMC,
ICC, CC and Smith.
What are the differences in strategic implications between PC and
MMPO? I recall that in going from PC to MMPO you loose several
things to gain later-no-harm.
You gain more than LNH when you trade PC for MMPO. You gain FBC. And I
consider that be of compelling importance. What you lose when you trade PC
for MMPO is Condorcet's Criterion. But I consider FBC to be more important
And, when AERLO is used with MMPO, SDSC and Strong FBC are gained.
(AERLO would give SDSC to PC, but not Strong FBC. MMPO's FBC compliance is
what allows it to gain Strong FBC from AERLO).
It's astounding, the combination of criterion compliances that MMPO offers,
especiallly when AERLO is added.
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