Question

please explain why

Suppose that we have three voters and four alternatives, and suppose the individual preference lists are as follows: Voter 1: abcd Voter 2: cabd Voter 3: b dca Suppose that the social choice procedure being used is sequential pairwise voting with a fixed agenda, and that you have agenda-setting power (that is, you get to choose the order). What order should you choose if you want alternative a to be the social choice? O a vs. d, then winner vs. b, then winner vs. c O c vs. d, then winner vs. b, then winner vs. a a vs. c, then winner vs. b, then winner vs. d a vs. c, then winner vs. d, then winner vs. b a vs. b, then winner vs. c, then winner vs. d

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Answer #1

c vs. d, then winner vs. b, then winner vs. a

(Between c vs d, c will win as voter 1 and 2 prefer c over d, then between c vs b, b wins as voter 1 and voter 3 prefers b over c, then between b vs a a will win as voter 1 and 2 prefer a over b. So, social choice is a.
In all other cases, a will not be the social choice because a is put against c in all the other options at some point and between a and c, c is will win as c is preferred over a by voter 2 and 3)

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