[EM] Margins vs. winning-votes

Markus Schulze markus.schulze at alumni.tu-berlin.de
Wed Feb 27 02:59:40 PST 2002


Dear Rob,

> First, a quick point:  There are (at least) two separate issues discussed on
> this list.  One is methods themselves, like Ranked Pairs vs. SSD vs. IRV vs.
> Borda; this issue generates most of the interesting posts and debates.  The
> other is the procedures of compiling the pairwise matrix for pairwise methods
> to operate on, like margins vs. winning-votes vs. all-votes (though I don't
> believe anyone still advocates all-votes).  These two issues are entirely
> orthogonal-- any pairwise method can use either the margins or the
> winning-votes approach, and I think Markus still prefers win-or-tie-votes for
> the official definition of Schulze's Method.

I agree with you. It is very problematic that RP and SSD are currently
discussed as if RP could be used only with margins and SSD could be used
only with winning-votes. (Actually, it seems to me that Adam Tarr really
believes that.)

Markus Schulze



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