Consider a two-period model in which an individual needs to decide how much to consume in...
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Consider a two-period model in which an individual needs to decide how much to consume in the present, c, and how much to consume in the future, c. The individual receives income, y, in the present, and a pension, y2, in the future. The individual can borrow or lend at real interest rate r, and its intertemporal marginal rate of substitution (MRS) is given by: = C2 -- C1 For simplicity, let's assume the individual has no wealth, W. The intertemporal budget constraint is then given by: C2 Y2 1+r 1+r a) Derive an algebraic expression for the optimal present and future consumption, c and c, as a function of the present value of lifetime resources (PVLR). Show your steps. b) Use y = 100,000, y = 11,000, and r = 10% to find the numerical values for c and c. c) Suppose there's a negative shock on the economy and present income, y, decreases to 80,000. Find the new numerical values for c and c. By how much present consumption, C, changed relatively to present income, y? Why is this the case? d) Suppose inflation expectations increase while the nominal interest rate is fixed. Is this change reflected by a shift of the budget constraint or a rotation of the budget constraint? Explain the substitution and income effects in play. Consider a two-period model in which an individual needs to decide how much to consume in the present, c, and how much to consume in the future, c. The individual receives income, y, in the present, and a pension, y2, in the future. The individual can borrow or lend at real interest rate r, and its intertemporal marginal rate of substitution (MRS) is given by: = C2 -- C1 For simplicity, let's assume the individual has no wealth, W. The intertemporal budget constraint is then given by: C2 Y2 1+r 1+r a) Derive an algebraic expression for the optimal present and future consumption, c and c, as a function of the present value of lifetime resources (PVLR). Show your steps. b) Use y = 100,000, y = 11,000, and r = 10% to find the numerical values for c and c. c) Suppose there's a negative shock on the economy and present income, y, decreases to 80,000. Find the new numerical values for c and c. By how much present consumption, C, changed relatively to present income, y? Why is this the case? d) Suppose inflation expectations increase while the nominal interest rate is fixed. Is this change reflected by a shift of the budget constraint or a rotation of the budget constraint? Explain the substitution and income effects in play.
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