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Questions › JNU › JNU SSS 2011 › Q79
1 mark, −0.25Microeconomics › Welfare economics and social choice › Pareto efficiency and Pareto improvementsHardabout 3 min

JNU SSS 2011 Question 79: Welfare economics and social choice

Suppose there are 3 alternatives xxx, yyy and zzz; and four individuals 1, 2, 3 and 4. The individuals' rankings (orderings) of the three alternatives, RiR_iRi​, i=1,⋯ ,4i = 1, \cdots, 4i=1,⋯,4 are given by R1:(xy)zR_1 : (xy)zR1​:(xy)z R2:yzxR_2 : yzxR2​:yzx R3:z(xy)R_3 : z(xy)R3​:z(xy) R4:(xy)zR_4 : (xy)zR4​:(xy)z (Notation : Alternatives inside the parentheses are indifferent to each other. If an alternative is written to the left of another alternative, then the former is preferred to the latter.) Then the set of Pareto-optimal alternatives is

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Suppose there are 3 alternatives x, y and z; and four individuals 1, 2, 3 and 4. The individuals' rankings (orderings) of the three alternatives, Rᵢ, i = 1, ⋯, 4 are given by R₁: (xy)z R₂: yzx R₃: z(xy) R₄: (xy)z (*Notation*: Alternatives inside the parentheses are indifferent to each other. If an alternative is written to the left of another alternative, then the former is preferred to the latter.) Then the set of Pareto-optimal alternatives is (A) {x, y} (B) {x, z} (C) {y, z} (D) None of the above

Also written as: Suppose there are 3 alternatives x, y and z; and four individuals 1, 2, 3 and 4. The individuals' rankings (orderings) of the three alternatives, R_i, i = 1,..., 4 are given by R_1: (xy)z R_2: yzx R_3: z(xy) R_4: (xy)z (*Notation*: Alternatives inside the parentheses are indifferent to each other. If an alternative is written to the left of another alternative, then the former is preferred to the latter.) Then the set of Pareto-optimal alternatives is

Welfare economics and social choice has come up 62 times in 6 exams since 2004.

What this question tests

This question is on Pareto efficiency and Pareto improvements, part of Welfare economics and social choice in Microeconomics.

What it means for an allocation to be efficient, checked in exchange economies and other settings.

TestStop has 40 past-paper questions on this subtopic.

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