[EM] Proportional election method needed for the Czech Green party - Council elections

[Juho]

This is a good approach in the category of simple (only one method  
used) proportional ranking based methods.

Use of proportional ranking reduces the proportionality of the council  
and the set of n presidents a bit but not much.

The election of the president can be seen to happen before the  
election of the council.

Same ballots are used for all elections. => Good for simplicity. Some  
small restrictions if the election criteria for P are different from  
the criteria of VPs and those of the council members.

The last vice president positions are probably not needed. Their order  
will probably become public but should maybe not be emphasized.

Markus Schulze of course recommends a Schulze method based approach  
but also any other good Condorcet method could be used as the basis.  
The Schulze family of methods has the benefit that it is quite well  
documented and the basic single winner Schulze method is also already  
used in some organizations. Probably Markus Schulze will also provide  
assistance in the promotion of the methods and related software. All  
these variants are however very similar so the argumentation and  
software is pretty similar in all cases.

I support this approach as one proposal in the category of simple  
proportional ranking based methods. No need to limit to the Schulze  
method based approach only but to allow also other base methods to be  
used (e.g. Ranked Pairs, minmax(margins)). Also other categories or  
maybe variants of this one should/could be discussed and proposed as  
alternative approaches.

Juho



On May 4, 2010, at 3:42 PM, Markus Schulze wrote:

> Dear Peter Zbornik,
>
> this is my proposal:
>
> --Use the Schulze proportional ranking method.
>
> --The top-ranked candidate becomes the president.
>
> --The second-ranked candidate becomes the vice president.
>
> --If the first two candidates happen to be male, then,
>  when you calculate the third-ranked candidate, restrict
>  your considerations to female candidates.
>
>  If the first two candidates happen to be female, then,
>  when you calculate the third-ranked candidate, restrict
>  your considerations to male candidates.
>
>  The third-ranked candidate becomes the 2nd vice president.
>
> --The fourth-ranked candidate becomes the 3rd vice president.
>
> --The fifth-ranked candidate becomes the 4th vice president.
>
> --If 4 of the already elected candidates happen to be male,
>  then, when you calculate the sixth-ranked candidate, restrict
>  your considerations to female candidates.
>
>  If 4 of the already elected candidates happen to be female,
>  then, when you calculate the sixth-ranked candidate, restrict
>  your considerations to male candidates.
>
>  The sixth-ranked candidate becomes the 5th vice president.
>
> --The seventh-ranked candidate becomes the 6th vice president.
>
> Markus Schulze
>
>
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