Dear Kristofer, you wrote (6 July 2008):
> I've been reading about the "decoy list" problem in mixed > member proportionality. The strategy exists because > the method can't do anything when a party doesn't > have any list votes to compensate for constituency > disproportionality. Thus, "cloning" (or should it be > called splitting?) a party into two parties, one for the > constituency candidates, and one for the list, pays off. > But is it possible to make a sort of MMP where that > strategy doesn't work? > > That MMP method would have to use some kind of reweighting > for those voters who got their way with regards to the > constituency members, I think, because if the method > just tries to find correlated parties, the party could > theoretically execute the strategy by running all the > constituency candidates as independents. What kind of > reweighting would that be? One idea would be to have a > rule that says "those with say x about the constituency > vote gets 1-x in the list vote". Then vary x until the > point of party proportionality is found. No matter what > party someone who makes a difference with regards to the > constituency candidate chooses, his vote loses power > proportionally, and thus decoy lists wouldn't work. Wow, that's exactly what I have proposed recently for an STV-MMP system in Berlin. Please read these papers: http://m-schulze.webhop.net/schulze4.pdf http://m-schulze.webhop.net/schulze5.pdf Read especially page 3 of paper "schulze5.pdf". Markus Schulze ---- Election-Methods mailing list - see http://electorama.com/em for list info
