[Election-Methods] Matrix voting and cloneproof MMP questions

[Juho]

On Jul 8, 2008, at 15:24 , Kristofer Munsterhjelm wrote:

> Even though I think multiwinner methods should be party-neutral, I  
> can see the appeal of MMP: parties are guaranteed to get their  
> share of the vote, even if the constituency vote is disproportional.

....
> use a proportional multiwinner method (like STV) for larger  
> constituencies, and then award list seats (of a much smaller share  
> than half the parliament) to patch up whatever disproportionality  
> still exists - even if the multiwinner method is perfect, rounding  
> errors regarding district size would introduce some  
> disproportionality.

I assume you want to have some level of regional representation. =>  
At least large districts with multiple seats.

You said you want the method to be party-neutral. => Maybe STV will  
do (I assume all party-like list (or tree) based methods would not be  
ok).

If you use large districts and STV in each of them (separate  
candidates for each district) that should give you already quite  
accurate political proportionality (only some rounding errors left).  
If the size of the districts is small that would cut out some small  
parties (or not give them fully proportional number of seats). (Some  
tricks could be used to fix also the remaining rounding errors if  
needed.)

My point is that if you are happy with large districts the "MMP  
part" (and separation of two different kind of representatives) is  
not necessarily needed.

Juho





		
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