Doug wrote: > Where can I find a good tutorial on ranked pairs (margins) and ranked > pairs (weighted votes)? I've seen much discussion about this lately, > but am not too familiar.
You can think of pairwise methods as having two steps: compiling the pairwise matrix given the ranked votes and choosing the winner given the pairwise matrix. Margins and winning-votes are two proposed procedures for the first step. There are many proposed procedures for the second step, including what I call Schulze and Tideman. My favorite combination is Schulze(margins), what Blake used to call Path Voting. Blake now argues for Tideman(margins), which is usually called Ranked Pairs. Mike Ossipoff promotes Cloneproof SSD, which is equivalent to Schulze(winning-votes); Markus Schulze's method is Schulze(win-tie-votes). I believe Steve Eppley preferred Tideman(winning-votes). My page http://www.onr.com/user/honky98/rbvote/desc.html has brief descriptions of many possibilities for the second step, including Schulze and Tideman. My voting calculator at http://www.onr.com/user/honky98/rbvote/calc.html implicitly uses margins for the first step, though no reference is made to the term. Check out http://www.fortunecity.com/meltingpot/harrow/124/path/ , Blake's excellent Ranked Pairs site, for more detailed RP information and analysis. I'm sorry to hear of IRV successes. The public might have to learn the truth about IRV the hard way. Oh, why can't they see the near-perfection of Approval? It's beautiful in its simplicity. ===== Rob LeGrand [EMAIL PROTECTED] http://www.aggies.org/honky98/ __________________________________________________ Do You Yahoo!? Try FREE Yahoo! Mail - the world's greatest free email! http://mail.yahoo.com/
