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21 terms

Chapter 1

STUDY
PLAY
Preference Schedules
a table showing the vote tally from the preference list ballot
Plurality Winner
is based on first-place rankings only. The winner is the choice that receives the most votes
Majority Winner
first on over half. more than 50%
Borda Count
assign points to a first-place ranking, n-1 to a second place ranking...the group ranking is established by totaling each choices points
runoff method
eliminate all choices except the two with the highest totals. then look at who is above what on the scheduels that are left
sequential runoff method
elimination the lowest, one at a time. doing it in rounds, eliminating the lowest choices in all of them
condorcet method
head to head competition, one has to win against everybody
pairwise voting
two choices are selected and a vote is taken. the loser is eliminated and a new vote is taken in which is paired against a new choice
voting insincerely
when people decide to vote differently from the way they feel about the choices
Arrows Conditions
trying to achieve fair conditions
nondictatorship
the preference of a single individual should not become the group ranking without considering the preferences of the others
individual sovereignty
each individual should be allowed to order the choices in any way and to indicate ties
unanimity
if every individual preferes one choice to another, the the group ranking should do the same
freedom from irrelevant alernatives
the winning choice should still win if one of the other choices is removed
uniqueness of the group ranking
the method of producing the group ranking should give the same result whenever it is applied to a givel set of preferences. the group ranking should also be transitive
exception to arrow
any group-ranking method will violate at least one of arrow's conditions in some situations
approval voting
you may vote for as many choices as you like, but you do not rank them
weighted voting
occurs whenever some members of the voting body have more votes than others have
winning coalitions
those with enough votes to pass an issue
power index
a measure of the power of a member of a voting body
a voters power index
is the number of winning coalitions to which the voter is essential