(a) A consumer has utility u(x,y,z)= In(x) + 2ln(y) + 3ln(z) over the three goods, x,y and z and pz = 1. Optimally she consumes 30 units of z. What is her income? How much money does she spend on x? (HINT: MUx =, MUY =, MUz = and remember the "equivalent bang for the buck" condition)
(a) A consumer has utility u(x,y,z)= In(x) + 2ln(y) + 3ln(z) over the three goods, x,y and z and pz = 1. Optimally she consumes 30 units of z. What is her income? How much money does she spend on x? (HINT: MUx =, MUY =, MUz = and remember the "equivalent bang for the buck" condition)
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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(a) A consumer has utility u(x,y,z)= In(x) + 2ln(y) + 3ln(z) over the three goods, x,y and z and pz =1. Optimally she
consumes 30 units of z. What is her income? How much money does she spend on x?
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1
2
3
(HINT: MUx = , MUY =, MUz =
and remember the "equivalent bang for the buck" condition)
y
Z
(b) Forget about (a). Suppose you have t = 29 hours in total to spend on 3 projects X, Y and Z to make some money.
If you spend x hours on project X, you make 2vx dollars;
you spend y hours on project Y, you make 3vy dollars;
If you spend z hours on project Z, you make 4vz dollars;
Writing down your "utility function" u(x,y,z) and the constraint, solve the utility maximization problem; what is
the optimal amount of time to spend on x ? on y? on z ?
If
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