Voting system R&D (Re: 2017 update to the SPI voting algorithm for Board elections)
Barak A. Pearlmutter
barak at pearlmutter.net
Sun Mar 5 11:18:36 UTC 2017
On 4 March 2017 at 13:01, Markus Schulze
<markus.schulze at alumni.tu-berlin.de> wrote:
> I recommend Schulze STV.
It is a very nice algorithm, which does about as well as any
polynomial-time algorithm could using rank ballots. It certainly
overcomes a lot of the practical pathologies in ScottishSTV or more
generally IRV-based STV systems.
I would agree that, assuming rank ballots, Schulze STV is the most
sensible choice.
If I were ranking them as fit-for-purpose in the current context, I'd rank
RRV > Schulze STV > ScottishSTV > Current System
If I wanted to be more informative, while using the entire dynamic
range, I'd say
RRV: 99
Schulze STV: 90
ScottishSTV: 50
Current System: 0
One issue with Schulze STV is that it is hard to explain to people who
are not mathematically sophisticated. That should not be a problem
here.
Cheers,
--Barak.
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