Kevin: Thanks for pointing that out.
Yeah, SICB(lv) seemed too good to be true. Ranking Favorite below Compromise, instead of equal-top, will increase the losing-votes in a Favorite > Compromise defeat, thereby helping Compromise if Beatpath(lv) is used. Then, so far, among the methods that I know the properties of, Symmetrical ICT is the best one, by strategy properties, complying with: FBC, CD, Condorcet (defined to respect voter-intent), 0-info Later-No-Help, and MMC unless there's a cycle among the majority-preferred set. It's necessary to give up a little, to get FBC ad CD, but it's well worth it. Is the combination of FBC and CD incompatible with MMC, and with Clone-Independence? If so, FBC and CD are more important. Mike Ossipoff On Fri, Dec 28, 2012 at 12:40 PM, Kevin Venzke <[email protected]> wrote: > Hi Mike, > > It's been quite awhile, but when I was trying to devise new FBC methods, I got > a strong sense that any kind of path tracing wasn't going to prove compatible > with FBC. The consequences of tracing effects through multiple candidates seem > > too unpredictable to offer the guarantee, that you will never want to position > your favorite candidate insincerely. > > > ICA and ICT are two-step methods where the second step obviously satisfies > FBC, and the first step is just carefully excluding some candidates in a way > that doesn't disrupt the FBC compliance. If the second step didn't satisfy > FBC I don't think Improved Condorcet would mitigate the issue. IC just > refrains > from doing something harmful of its own. > > The other Condorcet or Condorcet-like FBC methods are based on MinMax, which > doesn't use paths either. So, I'm pessimistic that it can be done. > > Kevin > > > > ----- Mail original ----- >> De : Michael Ossipoff <[email protected]> >> À : [email protected] >> Cc : >> Envoyé le : Jeudi 27 décembre 2012 22h01 >> Objet : [EM] Symmetrical-IC-Beatpath(lv)? >> >> What if, in Symmetrical ICT, the top-count were replaced with Beatpath(lv)? > ---- > Election-Methods mailing list - see http://electorama.com/em for list info ---- Election-Methods mailing list - see http://electorama.com/em for list info
