Dear Matthew Welland, you wrote (30 April 2006):
> Rubyvote has pure condorcet and cloneproof schwartz > sequential available. At Wikipedia, "pure Condorcet" is called "Minimax Condorcet": http://en.wikipedia.org/wiki/Minimax_Condorcet At Wikipedia, "cloneproof Schwartz sequential dropping" is called "Schulze method": http://en.wikipedia.org/wiki/Schulze_method ****************************************** You wrote (30 April 2006): > I want to keep things simple. > Does it matter which method I choose? Yes, it does matter. Minimax and Schulze are different methods. Example: 3 A > B > D > C 5 A > D > B > C 1 A > D > C > B 2 B > A > D > C 2 B > D > C > A 4 C > A > B > D 6 C > B > A > D 2 D > B > C > A 5 D > C > A > B Suppose d[X,Y] is the number of voters who strictly prefer candidate X to candidate Y. Then we get: d[A,B]=18 d[A,C]=11 d[A,D]=21 d[B,A]=12 d[B,C]=14 d[B,D]=17 d[C,A]=19 d[C,B]=16 d[C,D]=10 d[D,A]=9 d[D,B]=13 d[D,C]=20 Minimax chooses candidate B. The strongest paths are: A-18-B A-21-D-20-C A-21-D B-17-D-20-C-19-A B-17-D-20-C B-17-D C-19-A C-19-A-18-B C-19-A-21-D D-20-C-19-A D-20-C-19-A-18-B D-20-C Schulze chooses candidate A. Markus Schulze ---- election-methods mailing list - see http://electorama.com/em for list info
