[EM] Proportional Representation Systems I'd Support

[Kristofer Munsterhjelm]

Raph Frank wrote:
> On Wed, Mar 24, 2010 at 4:01 PM, James Gilmour
> <jgilmour at globalnet.co.uk> wrote:
>> No, it's not at all like MMP.  In MMP half or more of the members
>> are elected from single-member electoral districts (usually by 
>> FPTP).  The "additional members" in MMP are elected by party-list
>> (usually closed-list) taking into account the single-member seats 
>> already won by each party.  That is quite different from the
>> party-list voting system used for the Swiss Conseil National.
> 
> Sorry, I wasn't clear at all.  I was thinking of the decoy list issue
> with MMP.
> 
> What I meant was that it is like MMP in that the voters have a party 
> vote and an additional vote using a different method.

It sounds more like a straightforward party list, only that the 
composition within each bloc is determined by a (majoritarian) vote. 
Each ballot has a default vote order, but the voter can alter it by 
adding support to a candidate and deleting other candidates.

The general scheme would then be: party list with some majoritarian 
method determining the internal composition. Each party gets as many 
seats as the party list method says they're entitled to, then the 
majoritarian method allocates candidates within those "blocs".

As long as the majoritarian method is summable, the entire thing should 
be summable as well. For instance, one could devise a method where the 
internal vote is Condorcet, each party ballot having a default ordering 
that can be overridden by the voter.