[EM] Median ratings

Stéphane Rouillon stephane.rouillon at sympatico.ca
Tue Mar 30 07:51:38 PDT 2010

No, but although it is not summable, you can centralize the decision 

using a low number of communications.
> Date: Tue, 30 Mar 2010 15:09:06 +0200
> From: km-elmet at broadpark.no
> To: election-methods at lists.electorama.com
> Subject: [EM] Median ratings
> Hello,
> Is it possible to make Median Ratings summable? Median Ratings works 
> like this: gather rated ballots, then the winner is the candidate with 
> the greatest median score.
> Even if it's not a very good method, a way to make it summable would be 
> of interest to me because it would let me calculate median 
> proportionality/BR scores without having to store an array of all n 
> scores (for n rounds).
> That is, unless the summable version only determines which candidate has 
> the greatest median rating (or the order thereof) rather than the actual 
> median ratings for the different candidates.
> ----
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