1. Suppose that the representative consumer has a utility function defined over 11 consumption over two dates of the form U(C₁, C₂) = C₁zc₂2. The general form of the slope of the indifference curve for the representative consumer is - C₂/C₁. Moreover, remember that c₁ = Y₁ - S and C₂ = y₂ + s(1 + r). Assume that the representative consumer has an endowment of consumption goods in the two periods of y₁ = 20 and y₂ = 10. Assuming an interest rate r = 1, compute the equilibrium allocation and the implied savings. b. Suppose that, because of an attack of pessimism, the representative consumer assumes that future income will drop so that y₂ = 0. What happens to the savings s in

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1. Suppose that the representative consumer has a utility function defined over consumption over two dates of the form \( U(c_1, c_2) = c_1^{\frac{1}{2}} c_2^{\frac{1}{2}} \). The general form of the slope of the indifference curve for the representative consumer is \( -c_2/c_1 \). Moreover, remember that \( c_1 = y_1 - s \) and \( c_2 = y_2 + s(1 + r) \).

a. Assume that the representative consumer has an endowment of consumption goods in the two periods of \( y_1 = 20 \) and \( y_2 = 10 \). Assuming an interest rate \( r = 1 \), compute the equilibrium allocation and the implied savings.

b. Suppose that, because of an attack of pessimism, the representative consumer assumes that future income will drop so that \( y_2 = 0 \). What happens to the savings \( s \) in the first period?

c. In the previous part, the interest rate remained at 1. Now, consider the savings function, that is, the relationship between the real rate of interest and the amount saved. The equilibrium interest rate is then determined as a market price in the Saving-Investment diagram.

Given the typical shape of the investment curve, what would happen in response to the rate of interest in response to an attack of pessimism? Would the change in price (the interest rate) amplify or reduce the magnitude of the shock to the quantity of savings? Explain with the help of a graph.
Transcribed Image Text:1. Suppose that the representative consumer has a utility function defined over consumption over two dates of the form \( U(c_1, c_2) = c_1^{\frac{1}{2}} c_2^{\frac{1}{2}} \). The general form of the slope of the indifference curve for the representative consumer is \( -c_2/c_1 \). Moreover, remember that \( c_1 = y_1 - s \) and \( c_2 = y_2 + s(1 + r) \). a. Assume that the representative consumer has an endowment of consumption goods in the two periods of \( y_1 = 20 \) and \( y_2 = 10 \). Assuming an interest rate \( r = 1 \), compute the equilibrium allocation and the implied savings. b. Suppose that, because of an attack of pessimism, the representative consumer assumes that future income will drop so that \( y_2 = 0 \). What happens to the savings \( s \) in the first period? c. In the previous part, the interest rate remained at 1. Now, consider the savings function, that is, the relationship between the real rate of interest and the amount saved. The equilibrium interest rate is then determined as a market price in the Saving-Investment diagram. Given the typical shape of the investment curve, what would happen in response to the rate of interest in response to an attack of pessimism? Would the change in price (the interest rate) amplify or reduce the magnitude of the shock to the quantity of savings? Explain with the help of a graph.
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