MDDSR is the same as MDDA, except that it uses SR instead of Approval.
MDDSR:
A candidate is disqulified if another candidate is ranked over him/her by a
majority.
The winner is the un-disqualified candidate with the best SR score.
[end of MDDSR definition]
Because SR resembles Borda, I'll sometimes refer to MDDSR as MDDB. That name
is shorter, and it nicely follows MDDA.
As I said about SR, I haven't studied MDDSR yet, and it could have
disadvanages that I don't know of yet.
MDDSR's advantages with respect to MDDA are:
1. MDDSR is completely ordinal, which is an advantage if you want a
completely ordinal method.
2. Because MDDSR is completely ordinal, it asks less information from the
voter.
An advantage of MDDA over MDDSR:
MDDA has a briefer definition, and that may well be the decisive factor,
making MDDA a more winnable and more practical public proposal.
MDDSR, like MDDA, meets FBC and SFC. I haven't yet checked it out for SDSC.
Mike Ossipoff
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