1. and 2. 2. Derive the household’s intertemporal budget constraint in terms of C,, C2, Y1, Y2, and r. 3. State the household's utility maximization problem. 4. Find the optimal level of consumption in period 1, C,, in period 2, C2, and the associated level of saving, S,. Express your answer in terms of Y, , Y,, and r.

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Chapter1: Making Economics Decisions
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Exercise 2 (The Saving Schedule). Consider a two-period economy populated by identical
households with preferences defined over consumption in period 1, C1, and consumption in period
2, C,, and described by the utility function
Assume that households are endowed with Y, kilos of apples in period 1 and with Y, kilos of apples
in period 2. Let P, and P, denote the price of apples in periods 1 and 2. Households can save (or
borrow) at the nominal interest rate i. Let r denote the real interest rate, so that the gross real interest
rate is 1 +r = P, P, (1 + i). Let St denote saving in kilos of apples.
1. State the household's budget constraints in periods 1 and 2.
2. Derive the household's intertemporal budget constraint in terms of C1, C2, Y1, Y,, and r.
3. State the household's utility maximization problem.
4. Find the optimal level of consumption in period 1, C,, in period 2, C2, and the associated level
of saving, S,. Express your answer in terms of Y,, Y,, and r.
5. Now assume that output is 10 kilos of apples in both periods (Y, = Y, = 10) and that the real
interest rate is 0 percent (r = 0). Find C,, C2, and S1. (Your answer should be 3 numbers.) Finally,
compute the same 3 numbers but under the assumption that the real interest rate is 10 percent (r
0.1). Is saving increasing in r? Provide intuition.
Transcribed Image Text:Exercise 2 (The Saving Schedule). Consider a two-period economy populated by identical households with preferences defined over consumption in period 1, C1, and consumption in period 2, C,, and described by the utility function Assume that households are endowed with Y, kilos of apples in period 1 and with Y, kilos of apples in period 2. Let P, and P, denote the price of apples in periods 1 and 2. Households can save (or borrow) at the nominal interest rate i. Let r denote the real interest rate, so that the gross real interest rate is 1 +r = P, P, (1 + i). Let St denote saving in kilos of apples. 1. State the household's budget constraints in periods 1 and 2. 2. Derive the household's intertemporal budget constraint in terms of C1, C2, Y1, Y,, and r. 3. State the household's utility maximization problem. 4. Find the optimal level of consumption in period 1, C,, in period 2, C2, and the associated level of saving, S,. Express your answer in terms of Y,, Y,, and r. 5. Now assume that output is 10 kilos of apples in both periods (Y, = Y, = 10) and that the real interest rate is 0 percent (r = 0). Find C,, C2, and S1. (Your answer should be 3 numbers.) Finally, compute the same 3 numbers but under the assumption that the real interest rate is 10 percent (r 0.1). Is saving increasing in r? Provide intuition.
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