STV for party candidate lists?
DEMOREP1 at aol.com
DEMOREP1 at aol.com
Wed Jul 29 22:00:54 PDT 1998
Mr. Marcus Schulze wrote--
A multi-member election method is called
"housemonotonous" if & only if for every
candidate A, for every interger N, and for
every integer M:
Suppose, candidate A would be elected, if
there were N seats. Then candidate A must also be
elected, if there are M seats with M > N.
STV violates "housemonotonicity."
Example:
28 voters vote A > C > B.
40 voters vote B > A > C.
32 voters vote C > A > B.
[100]
One seat: Candidate C is elected. [using IRO ?]
Two seats: Candidates A and B are elected. [using ??]
-------
D- For electing one, Candidate A is the Condorcet winner. Candidate B is a
Condorcet loser (60 votes in last place).
60 A/B 40
68 A/C 32
40 B/C 60
For electing one, if there was not a Condorcet winner, then the winner's quota
is obviously a majority (the Droop quota for one).
However for electing 2 or more using STV the quota is the Hare Quota (total
votes/seats). 100/2 = 50
Bucklin first 2 places
A 100
B 40
C 60
The 50 A can come by dividing the
28 voters vote A > C > B.
into
10 A > C > B and
18 A > C > B
40 B > A > C.
32 C > A > B.
10 + 40 = 50 A
18 + 32 = 50 C
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