Majority/Quota Combinations
DEMOREP1 at aol.com
DEMOREP1 at aol.com
Mon Aug 3 01:38:24 PDT 1998
Many of my earlier postings are definitely incorrect due to the following
regarding majority or quota combinations.
The early combinations--
The dash (-) means *versus*
2 1-1
3 1-2
2-1
4 1-3
2-2
3-1
5 1-4
2-3
3-2
4-1
6 1-5
2-4
3-3
4-2
5-1
Etc.
There is a plurality/ majority number of votes on the left of each set.
If there is a majority with 1 on the left, then such 1 is an obvious first
choice majority winner.
The problem obviously is when a majority is divided with 3 or more choices (in
executive and judicial elections).
Where a number is more than 1, it means all of the combinations.
Example- With 4 choices, A, B, C, D (the slash means a combination, e.g. B/D
means B > D or D > B), the 2-2 combinations are--
Left Right
A/B C/D
A/C B/D
A/D B/C
B/C A/D
B/D A/C
C/D A/B
A majority on the left may happen before the N versus the Others combinations.
Example- 6 choices (all have YES majorities), 3 sheriffs to be chosen, 100
voters
Assume only the D/F combination gets a majority in all of the 2-4
combinations-
35 D > F > [all combinations of ABCE]
23 F > D > [all combinations of ABCE]
58
Both D and F should be chosen. That is, the D/F voters are the first majority
(with D and F being a partial twin).
The remaining position then becomes a 4 choice case with 1 to be chosen.
The fewest YES votes could be used as a final tiebreaker to remove losers.
The above general case math plainly indicates that the tiebreaker in the
infamous 3 choice circular tie case should be the highest majority of the
first two-
N1 AB C
N2 BA C
N3 AC B
N4 CA B
N5 BC A
N6 CB A
One of the combinations (N1+N2, N3+N4, N5+N6) will be the highest majority
(assuming no truncated votes).
The choice on the right loses. The 2 remaining go head to head. Much confusion
has happened since the 2-1 combination is the first combination with a divided
majority.
The preceding also applies to STV p.r. elections.
P = Party or Group of parties, A, B = Party candidates or Party, T =
Independent candidate
YES NO Number Vote
P1
P1A
P1B
P2
P2A
P2B
P2C
T1
T2
T3
A YES/NO vote on each choice might produce a YES majority which should get a
majority of the voting power in the legislative body.
If a quota method is used, then after doing the head to head math the above
could be used to produce quota winners.
Example---1000 voters, 25 seats, 110 candidates, Hare quota (1000/25 = 40)
Parties X and Y each get YES Majorities (by mutual support of their voters).
Their initial number of quotas would be dependent on the number of first
choice votes for each.
X gets an initial 8 seats
Y gets an initial 7 seats.
In head to head math (all combinations of 25 candidates versus 1 candidate
with 84 test loser candidates), assume 4 X party and 2 Y party candidates get
quotas when in all of their 25 or 1 sets.
The remaining seats (the other 4 X and 5 Y initial party seats and the other
10 seats) would be determined in like manner among the remaining parties/
party candidates/ independent candidates with a quota replacing a majority.
The X and Y parties might get additional seats depending on the head to head
and/or tiebreaker and/or residual math results.
I again suggest that no quotas be used but that the p.r. winners have a voting
power equal to the number of votes they each finally receive.
A computer would have to do the math in most elections.
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