# 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

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

```