CST 504 Voting Procedure Introduction

Voting Procedures

Majority Rule

• Majority rule is when a vote gets over 50% of the votes.

MaJority rule & plurality voting • Majority rule:• The candidate who receives an absolute majority

( more than half the votes ) wins.

• Plurality voting:• Candidate who receives most votes wins.

candidate A B C# votes received

23 28 12

Example

Majority rule: No candidate wins

Plurality voting: Candidate B wins

Plurality voting

Votes Winning Option: Total Votes:

Option A: Poutine 8

Option B: New York 8

Option C: History 6

The candidate who receives the most votes wins.

Options: (A) Votes:

Pizza: 3

Poutine: 8

Chicken: 3

Ice cream: 4

Total: 18

Options: (B) Votes:

Paris: 2

London England:

2

Rome: 6

New York City:

8

Total: 18

Options: (C) Votes:

Gym: 5

Art/Music/Drama

4

Math: 3

History: 6

Total: 18

Borda count • Each voter ranks candidates by order of preference.• If there are n candidates n points will go to each voter’s

FIRST choice…• n -1 to their SECOND etc..• The candidate with the most points wins.

Borda Count • Borda Count is adding the amount based on the results.

18 14 12 101st choice (X3)

A B C C

2nd choice (X2)

B A A B

3rd choice (X1)

C C B A

Answers • A-(18 x 3)+(14 x 2)+(12 x 2)+(10 x 1)=116• B-(18 x 2)+(14 x 3)+(12 x 1)+(10 x 2)=110• C-(18 x 1)+(14 x 1)+(12 x 3)+(10 x 3)=98• A has more points so they are the winner

Condorcet method• Each voter ranks candidates by order of preference.• The candidate who defeats all other candidates one-on-

one wins.

• http://www.youtube.com/watch?v=5RtOCvFqIKk

Condorcet Method

Condorcet Method is the most preferred of the votes such as A-B, A-C, B-C and you compare to see who wins…..

18 14 12 101st choice A B C C2nd choice B A A B3rd choice C C B A

Answers • A vs B= A(18+12=30) - B(14+10=24)- A wins• A vs C= A(18+14=32) - C(12+10=22)- A wins• B vs C= B(18+14=32) - C(12+10=22)- B wins • A is most preferred so A is the winner.

Proportional representationUnder a proportional representation voting system, if 30% of voters support a particular party then roughly 30% of available seats will be won by that party.