[EM] simple MMP-ish idea - works with plurality voting in single-winner districts

[Adam Tarr]

On 8/31/05, stephane.rouillon at sympatico.ca <stephane.rouillon at sympatico.ca> 
wrote:
> 
> That caracteristic is one of SPPA too.


Yes, the point of the method I mentioned was not only that it worked in 
single-member districts, but that it worked on lone mark plurality ballots.

As an aside, it seems that SPPA produces a strong incentive to "bullet vote" 
the candidate from your favorite party. As such, it actually seems fairly 
similar in result to the method I mentioned. 

> De: Adam Tarr <ahtarr at gmail.com>
> > Date: 2005/08/30 mar. PM 03:54:14 GMT-04:00
> > À: election-methods-electorama.com at electorama.com
> > Objet: [EM] simple MMP-ish idea - works with plurality voting in
> > single-winner districts
> >
> > Just a random thought I had the other day for a PR system that would 
> work
> > using only single-winner districts.
> >
> > Every candidate has the option of declaring a party affiliation. If a
> > candidate does not declare a party affiliation, then they are a "party 
> of
> > one" for the purposes of the algorithm.
> >
> > After the election is completed in all N districts, the votes cast for 
> each
> > party in all districts are totalled. Seats are then allocated to each
> > "party" using a typical aportionment scheme (webster's method, for
> > instance).
> >
> > The winners of the election are found by maximizing the number of voters 
> who
> > voted for the winning candidates, with the constraints that:
> >
> > 1) Each "party" gets their appropriate number of seats
> > 2) Each district elects exactly one candidate.
> >
> > This will produce some strange results in certain cases. For instance, 
> if
> > the Greens poll at some consistent low percentage all around a state, 
> then
> > they might elect one candidate from a district somewhere, even though 
> that
> > candidate finished a distant third in the election in that district. But
> > that district does get local representation, and proportionality across 
> the
> > state is preserved.
> >
> > In the case where there are only two parties, then it's easy to see what 
> the
> > result will be. Imagine party A gets 55% of the vote in a 20-seat
> > legislature, while party B gets 45% of the vote. Then the 11 party A
> > candidates who polled highest will be elected, and the other 9 districts
> > will be won by party B. This would be true even if the party A candidate 
> won
> > 75% of the districts due to Gerrymandering.
> >
> > I don't claim that this is a great, or even an especially good PR 
> method.
> > But it has the distinction that it works using simple plurality voting 
> in
> > single-member districts.
> >
> > -Adam
> >
> >
> 
> 
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> 
> 
>
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