[EM] Median bifurcation using pairwise matrix

Blake Cretney bcretney at postmark.net
Tue Aug 14 17:49:24 PDT 2001

On Mon, 13 Aug 2001 16:35:04 -0700 (PDT)
Rob LeGrand <honky1998 at yahoo.com> wrote:

> FYI, I believe this procedure will give the same results as the
> called Nanson in Vandercruyssen's paper "Analysis of voting
procedures in
> one-seat elections: Condorcet efficiency and Borda efficiency".  The
paper also
> describes the procedure that Blake's site calls Nanson, but calls it
> See the paper at

According to that paper, Nanson invented both.  I gather the later one
was invented with Baldwin.

I've now added what the paper calls Nanson to my web site, under the
name of Nanson (original).  It passes Smith and reversal symmetry, but
fails independence of clones and monotonicity.

In an attempt to reduce confusion, I've renamed the Nanson-Baldwin
method, which I used to call Nanson, to Borda-Elimination on my site. 
I give Baldwin as another possible name, though.

Blake Cretney

See my Election Method Resource

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