[EM] proportional constraints - help needed

[Peter Zbornik]

James, Jonathan,

I need that the quoted-in people are quoted-in in such a way, that the
proportionality of the election is not significantly disturbed.

I think Rosenthiel's approach has the following insufficiencies:
If I elect five women, and then increase the number of elected seats
until two more men have been elected, then we might end up with a
situation, where
a] one coalition of voters get all the seats (the easiest example is
when we elect two ordered seats, one man and one woman) - i.e. the
resulting list is not a proportionaly ordered list
b] one coalition of voters get all the qouted-in men - i.e. the
resulting list has no proportionality between gender.

Best regards
Peter Zborník


2013/2/6 James Gilmour <jgilmour at globalnet.co.uk>:
>> Jonathan Lundell  > Sent: Tuesday, February 05, 2013 6:40 PM
>> There is, I think, an underlying misconception here, namely
>> that STV order of election can be interpreted as a ranking of
>> level of support. It's not, in the general case.
>
> Jonathan is absolutely right.  If you want lists ordered by relative support, you need to adopt a procedure like that recommended by
> Colin Rosenstiel and used by some UK political parties when they have to select ordered lists for closed-list party-PR elections.
>
> First you use ordinary STV-PR to elect the required total number of candidates.  Then you conduct a series of STV-PR elections, each
> for one vacancy less than the preceding election.  The unsuccessful candidate takes the lowest vacant place on the ordered list.
> Continue until you run-off between the top-two for the second-last place.
>
> For full details, see:
>   http://www.crosenstiel.webspace.virginmedia.com/stv/orderstv.htm
> and
>   http://www.crosenstiel.webspace.virginmedia.com/stv/ordstvdt.htm
>
> The second one includes a constraint for candidate's sex.
>
> James Gilmour
>
>
>
>
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