[EM] Condorcet for public proposals - Tournament

[Kevin Venzke]

Ernest,

 --- Ernest Prabhakar <drernie at mac.com> a écrit : 
> > BTW:  Debatable whether voters should be permitted to rank candidates 
> > as equal.
> 
> Is there any good reason not to?  Implicit equal ranking certainly 
> makes it clearer about how unlisted candidates are counted.   Any if at 
> all possible, it seems good to give people the option of equality 
> rather than forcing a random choice.    Has anyone presented a clear 
> argument for or against equal ranking?

Maybe it's easier to tamper with ballots if more than one candidate can
be given the same rank?  That's all I can think of.

> >   If so then, for each pair of equal candidates, count 1/2 win for 
> > each (thus if two voters rank A=B=C then A>B, B>A, A>C, C>A, B>C, and 
> > C>B each get credited one full win).
> 
> That doesn't make any sense to me.   If two candidates are ranked, I 
> think that neither should get the win -- at least if we're doing 
> winning votes (wv)

Giving half-votes is the Margins (and Symmetric-Completion) interpretation.
I suggest the same method be used for both expressed and truncated equal
rankings.  I can't think why there should be a difference in treatment.


Kevin Venzke
stepjak at yahoo.fr


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