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General Equilibrium in an Endowment Economy Suppose the economy is populated by many identical agents. These agents act as price takers and take current and

General Equilibrium in an Endowment Economy Suppose the economy is populated by many identical agents. These agents act as price takers and take current and future income as given. They live for two periods: t and t + 1. They solve a standard consumption-savings problem which yields a consumption function

Ct = C(Yt , Yt+1, rt).

e. Define the IS curve and graphically derive it.

(f) Graph the Y s curve with the IS curve and show how you determine the real interest rate.

(g) Suppose there is an increase in Yt . Show how this affects the equilibrium real interest rate. Explain the economic intuition for this.

(h) Now let's tell a story. Remember we are thinking about this one good as fruit. Let's say that meteorologists in period t anticipate a hurricane 267 in t + 1 that will wipe out most of the fruit in t + 1. How is this forecast going to be reflected in rt? Show this in your IS Y s graph and explain the economic intuition.

(i) Generalizing your answer from the last question, what might the equilibrium interest rate tell you about the expectations of Yt+1 relative to Yt?

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