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Questions › IIT JAM › IIT JAM 2026 › Q55
2 marksMicroeconomics › Demand theory and elasticity › Compensating and equivalent variationHardabout 3 min

IIT JAM 2026 Question 55: Demand theory and elasticity

In a two-good world, utility is u(x1,x2)=x1x2u(x_1,x_2)=x_1 x_2u(x1​,x2​)=x1​x2​. Each good's market price is Rupee 1 and disposable income is Rupees 100. If the price of X2X_2X2​ is doubled keeping the price of X1X_1X1​ unchanged, then the associated Compensating Variation is Rupees ________ (rounded off to one decimal place).

Answer and worked solution

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Plain-text version

In a two-good world, utility is u(x₁,x₂)=x₁ x₂. Each good's market price is Rupee 1 and disposable income is Rupees 100. If the price of X₂ is doubled keeping the price of X₁ unchanged, then the associated Compensating Variation is Rupees (*rounded off to one decimal place*).

Also written as: In a two-good world, utility is u(x_1,x_2)=x_1 x_2. Each good's market price is Rupee 1 and disposable income is Rupees 100. If the price of X_2 is doubled keeping the price of X_1 unchanged, then the associated Compensating Variation is Rupees (*rounded off to one decimal place*).

Demand theory and elasticity has come up 161 times in 7 exams since 2004.

What this question tests

This question is on Compensating and equivalent variation, part of Demand theory and elasticity in Microeconomics.

Money measures of the welfare change from a price change.

TestStop has 7 past-paper questions on this subtopic.

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