Mavis earns income in two periods, M1 and M2 and buys consumption goods in twd periods as well, C, and C2 (the numbers indicate the period in which the income is earned and the consumption goods are purchased). Her utility function is as follows: U=U(C, )++ U(C,) where & is the time rate of preference and 1+8 U(C,)=U(C,) when C, = C, and U(C) is well behaved. Mavis can borrow money from or save money at a local bank. The interested rate (whether saving or borrowing) is r. а. Write out Mavis' utility maximizing Lagrangian equation. No need to solve it. b. Describe the process for conducting the comparative statics necessary to determine the sign of the following change: ôr С. What is the significance of 6? Assuming you would graph her consumer choice model with C on the horizontal axis, explain why a higher value for & would mal her indifference curves steeper or flatter.

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter4: Utility Maximization And Choice
Section: Chapter Questions
Problem 4.14P
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Mavis earns income in two periods, M, and M2 and buys consumption goods in
twd periods as well, C, and C2 (the numbers indicate the period in which the income is
earned and the consumption goods are purchased). Her utility function is as follows:
U=U(C, ) +:
U(C,)
where & is the time rate of preference and
1+8
U(C,)=U(C,) when C, = C, and U(C) is well behaved.
Mavis can borrow money from or save money at a local bank. The interested rate
(whether saving or borrowing) is r.
а.
Write out Mavis' utility maximizing Lagrangian equation. No need to solve it.
b.
Describe the process for conducting the comparative statics necessary to
determine the sign of the following change:
Or
С.
What is the significance of 6? Assuming you would graph her consumer choice
model with C on the horizontal axis, explain why a higher value for & would make
her indifference curves steeper or flatter.
d.
Draw the consumer choice graph for this situation such that M1 = $10,000, M2 =
$20,000 and both 8 =0.25 andr = 0.25. Label the intercepts and slope of the
budget constraint and draw in their utility maximizing indifference curve. How
much will they consume in period 1 and period 2? Explain whether an increase in
the interest rate will make them feel richer or poorer.
Transcribed Image Text:Mavis earns income in two periods, M, and M2 and buys consumption goods in twd periods as well, C, and C2 (the numbers indicate the period in which the income is earned and the consumption goods are purchased). Her utility function is as follows: U=U(C, ) +: U(C,) where & is the time rate of preference and 1+8 U(C,)=U(C,) when C, = C, and U(C) is well behaved. Mavis can borrow money from or save money at a local bank. The interested rate (whether saving or borrowing) is r. а. Write out Mavis' utility maximizing Lagrangian equation. No need to solve it. b. Describe the process for conducting the comparative statics necessary to determine the sign of the following change: Or С. What is the significance of 6? Assuming you would graph her consumer choice model with C on the horizontal axis, explain why a higher value for & would make her indifference curves steeper or flatter. d. Draw the consumer choice graph for this situation such that M1 = $10,000, M2 = $20,000 and both 8 =0.25 andr = 0.25. Label the intercepts and slope of the budget constraint and draw in their utility maximizing indifference curve. How much will they consume in period 1 and period 2? Explain whether an increase in the interest rate will make them feel richer or poorer.
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