[EM] Proportional preferential voting
s349436 at student.uq.edu.au
Thu Sep 16 22:28:09 PDT 1999
I was thinking more of explaining what your or's meant... starting
from the beginning with a sentence explaining the layout of the model and
the structure you describe.
> [The STV 2 winner formula is too complex and yet wrong.
> The transfer denominator is wrong in "the" method as far
> as I know. Maybe it reviewed every 100 years or so.
Droop or Hare? Droop (1/(n+1)) makes intuitive, operational, normative,
and positive sense.
> I don't know much about "norms of voting".
> I retract the words "paradoxes .. can be removed".
> Some subsequently attached comments can be paradoxical.
> What are "norms of voting". The "_complete_" preferences
> of voters get separated from the quantities of bundles
> of papers. It is possible to make the 'loss' point with
> sample election examples.
I'm using what I've been taught in my university's government department's
parlance- a norm, as in normative economics, is a statement of value or
an axiom... a principle which either is self-evident or is assumed to be
so for the best of worlds. Independence of the removal of irrelevant
alternatives (my particular fave) is a norm of voting because I hold that
elections must be "fair" and that "fair" includes a self-evident "right"
to acknowledge all options without loss whenever one can (which is not
always, because Condorcet paradoxes are an exception). Another example of
a norm of voting is monotonicity- a behaviour of indication will always
have an improving/neutral effect.
> This rule doesn't even hold for FPP:
> >> 'permuting all preferences before a preference for a
> >> particular candidate, never makes a difference to
> >> that candidate's win/lose status'.
Where a Condorcet winner exists, this holds for Condorcet methods.
> I'll name my method IFPP (Improved FPP or enhanced STV)
> The two cases:
> A 49
> ACB 2
> B 50
> C 30
> FPP: A wins, STV: A wins, IFPP: A wins.
> A 49
> B 50
> C 30
> CAB 2
> FPP: B wins, STV: A wins.
> IFPP: A wins (since (49+50+30+2)/3 = 43.666.. < 49, else B)
I feel I'm starting to understand... I take it IFPP involves- determining
the number of electors and dividing it by 3, and then- holding a runoff
between the one or two candidates who make such a quota. Am I right? A
similar extension which was mooted by a person on this list a few months
ago was progressively going from quota to quota until one had a single
candidate left. For continuous reductions of quota, this evolves into
common or garden Australian STV (STV is a family, not just one electoral
> >> I'd hope to see an example proving that the Condorcet method
> >> violates the "one man one vote" idea.
> >Huh? (Sorry for abruptness...)
> ("man" means "vote", and "vote" means 'effect' or influence).
As in, where n voters of type a are required to change the result, >n of
type b are required to do the same thing? I'll agree with that and maybe
soon I'll come back with an example...
> STV passes that test of "one man, one vote" flawlessly.
I'm not entirely sure about this... can you tell us why?
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