[EM] Pirate Party of Sweden adopts the Schulze method

[Kristofer Munsterhjelm]

Juho wrote:
> They also said:
> 
>  > Condorcet-Schultze med 30% kvotering
> 
> = Condorcet-Schultze with 30% quotas
> 
> I just wonder if that adds something to the basic Schulze method.

That means that 30% of the people on the list has to have some property. 
I'm not sure what that property is, but I guess it refers to matters of 
gender - at least 30% of each.

I don't see any mention of how they're going to achieve this. If I were 
to make something like that, I would probably divide the result into 
ordered lists, based on the property (e.g. gender), then go 
straightforward down along the social ordering until either group 
decreases below the quota. At that point, pick the highest ranked from 
the list of the minority in question until that group is no longer below 
the quota.

One could probably devise even more complex solutions involving global 
optimization, particularly for methods that return a cardinal social 
"ordering" (a ratings ballot as output). For such an ordering, one could 
simply phrase it as an integer programming problem: maximize the total 
rating, subject to that one may not pick more than the number of seats 
and that no group may have less than 30% of the seats. I would be 
surprised if that's how they do it, though, in particular since the 
Schulze method doesn't return a cardinal social ordering.