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Consider the Fisher's Model that we discussed in class: a consumer who lives for two periods, with income in period one and income in period

Consider the Fisher's Model that we discussed in class: a consumer who lives for two periods, with income in period one and income in period 2. This consumer's

12

lifetime (two-period) preferences are given by:

(1, 2)= U(1)+ U(2),

12 12

Where U(1)= 1 1 and, U(2)= 2 2 , and is the discount rate.

The consumer maximizes his two-period utility.

a) Write down the consumer's maximization problem, and set up the Lagrangian (4 points). b) Solve the problem and obtain the consumer's Euler equation. (4 points) Interpret the Euler equation. (2 points)

c) Is your result different from Keynes' consumption theory? Explain it. (2 points)

d) Suppose that = $200, = $100, = 150 ,and =160. What is the interest rate, r? (3 1212

points) In equilibrium, how will the consumption decision of this consumer change if the interest rate increases? Explain it in words (3 points).

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