Arrow’s theorem demonstrates that the use of elections does not ensure that the majority’s preference will be selected. Explain Arrow’s theorem, detail what some of the different methods of tallying votes are, and give a real-world example of at least one of these methods and the shortcomings associated with it.
What will be an ideal response?
Ans: Kenneth Arrow demonstrated that the use of elections does not ensure that the majority’s preference will be selected. Arrow found that different methods of counting votes lead to very different election outcomes. He also demonstrated that we can never be certain that any one method of counting votes will lead to the majority’s single preferred option. The methods are as follows:
• single vote system
• run-off election system
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