1. p.33 (28 run off, 30 run off, 32, 34ab run off)
Day 3: Plurality with elimination, Runoff method, Condorcet criterion (Txt:1.2,1.3 & SOL: DM.8)
Classwork:
p.33 (27abc run off, 29ab run off, 31,
33ab run off)
Homework (day 3):
p.33 (28 run off, 30 run off, 32, 34ab run off)

2. Plurality with Elimination (Sequential Run-Off)
Each voter votes for one candidate.
A candidate that receiving the majority of the votes is declared the winner.
If no candidate receives a majority of the votes, then the candidate/candidates with the fewest votes is dropped from the ballot and a new election is held.
You follow this process until a candidate receives the majority of votes.

3. Ex How many voters are there? 336 7 5 3 9
1st C A B D
2nd
3rd
4th
How many voters are there? 33
Therefore how many are needed for a majority? 17
A = 10, B = 9, C = 11, D = 3
Who has the majority?
No one so D looses and is eliminated

4. Therefore A wins!!!! 6 10 5 3 9 1 C A B 2 6 7 5 3 9 1 C A B 2 6 10 5 36 10 5 3 9 1 C A B 2 6 7 5 3 9 1 C A B 2
Eliminate D 6 10 5 3 9 1 C A 2 22 11 1 A C 2
Eliminate B
Therefore A wins!!!!

5. Run – off Method https://www.youtube.com/watch?v=RsT1NYsPn2o
You only keep the top two first place voters and have an election between those two.

6. Ex How many voters are there? 289 5 4 2
1st C E B A
2nd D
3rd
4th
5th
How many voters are there? 28
Therefore how many are needed for a majority? 15
A = 6, B = 5, E = 9
C = 8, D = 0
3) Who should you keep? C and E 8 9 5 4 2 1 C E 19 9 1 C E 2
4) Who is the winner? C

7. Condorcet Criterion
1. If candidate X can defeat each of the other candidates in a head- to-head vote, then X is the winner of the election. Say you have candidates: A,B,C,D First say A vs. B if B wins Then try B vs. C if B wins Then try B vs. D However, if C won in step 2 then you have to go back and check C vs. A and C vs. D
(Begin at 4:30 minutes into video)

8. Ex A B C
A versus B to B wins A B C
B versus C to B wins A B C