Lec 5 - How Votes Are Counted 1/27/09 Fairness Criteria...

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Unformatted text preview: How Votes Are Counted 1/27/09 Fairness Criteria (Restated) IIA (independence from relative alternatives): the winning alternative should not depend on how many other alternatives are available. Monotonicity: voting rule does not put at a disadvantage an alternative obtaining more support among the voters. Colomer, Table 3.1 What is the message behind these numbers? Who is the median voter/party in these cases? How is it measured? Single Winner Rules Basic trade off: Effectiveness: capacity to produce outcomes Efficiency: social utility of those outcomes The more inclusive the rule: the more efficient is the outcome, the less effectiveness in producing those outcomes The more exclusive the rule: the greater the effectiveness at producing outcomes outcomes more inefficient Single Winner Rules Unanimity: Gods will and sovereign states Efficiency--can be high but: Depends on location of SQ Distribution of bargaining costs Agenda setting power Ineffective Immobility the danger Stability the reverse side Monotonic Not IIA Single Winner Rules...
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Lec 5 - How Votes Are Counted 1/27/09 Fairness Criteria...

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