1. Range Voting

2. What is Range Voting? From Wikipedia: Similar to:
“Range voting (also called ratings summation, average voting, cardinal ratings, score voting, 0–99 voting, the score system, or the point system) is a voting method for one-seat elections under which voters score each candidate, the scores are added up, and the candidate with the highest score wins.”
Similar to:
Surveys
Media reviews
“Hot or Not”
Athletic judgment processes

3. What is Range Voting? (cont.)
Assumes the “right” winner is the one whose election results in least amount of social dissatisfaction, counterbalancing sheer numbers
Bayesian Regret
Goodbye Majority Rule!!!
Ex: I might win the majority of votes, but the losing minority is more dissatisfied with my election than my majority would have been if my opponent had won.

4. Historical Usage Sparta? http://rangevoting.org/BPSparta.html

5. For Example

6. Arrow’s Impossibility Theorem
Ranged voting satisfies the criteria of a deterministic voting system, with non-imposition, non-dictatorship, monotonicity, and independence of irrelevant alternatives (sometimes), but the method does not violate Arrow’s Impossibility Theorem because it utilizes scoring rather than ranking (violating Arrow’s universality criterion).

7. Advantages of Range Voting
Overlapping Support? No Problem!
Taft/Roosevelt in 1912 (Wilson says “Thanks Mr. Bull Moose”)
Nader/Gore in 2000 (Bush says “Thanks Green Party”)
At least that guy didn’t win
Proponents:
William Poundstone, Gaming the Vote: Why Elections Aren’t Fair (and What We Can Do About It)

8. Problems Voter ignorance Preference isn’t 1-10 Use of tactical voting
Range voting is kinda complicated
Preference isn’t 1-10
Subjectivity
Use of tactical voting
Sincerity
Min/Maxing (like in RPG’s)
The cost of change

9. Discussion
Would you advocate the use of this system in politics? In any election?
Can you think of any other problems with this system of voting?
Any questions?

10. References http://en.wikipedia.org/wiki/Range_voting