2013/1/7 Greg Nisbet <gregory.nis...@gmail.com> > Hey, I'd like to get a sense of what sorts of multiwinner methods are > currently known that are reasonably good and don't require districts, > parties, or candidates that are capable of making decisions (I'm looking at > you, asset voting). >
Like Abd, I wonder at the basis for your criteria. I think that for reform in most English-speaking countries, districts are usually an advantage, parties arguably so, and intelligent candidates always. Also, this thread gives me an excuse to mention a thought I've recently had. In between purely majoritarian methods and truly proportional ones, there is a third option: median-preserving ones. That is, the legislature is not proportional, but if the voters and candidates are on a 1D (or N-dimensional single-peaked?) spectrum, then the median representative in the winning set is the one closest to the median voter in the electorate. The only example I've thought of so far is NP-complete (MJ ballots, each voter has their individual threshold set as high as possible so that they approve 1/2 of the winning slate) but I'm sure that there are other methods which would do this. And such methods might have political advantages in certain contexts. Jameson > > I had an idea for a variant of STV where the "elimination order" for > candidates is the reverse of how often they are approved (i.e. given a rank > on the ballot instead of no rank). This method may already have been > proposed some time ago, but I think it warrants attention regardless. This > somewhat changes the interpretation of an STV ballot because a truncated > ballot is no longer strictly less powerful than a non-truncated one. Since > the elimination order is fixed from the beginning and doesn't depend on > subsequent decisions, I suspect this modification to STV would at least > reduce non-monotonic behavior (however one might quantify degree of > monotonicity). > > > ---- > Election-Methods mailing list - see http://electorama.com/em for list info > >
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