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3. LaunchPad. In the United States, the capital share of GDP is about 30 percent, the...

Question:

3. LaunchPad. In the United States, the capital share of GDP is about 30 percent, the average growth in output is about 3 per
3. LaunchPad. In the United States, the capital share of GDP is about 30 percent, the average growth in output is about 3 percent per year, the depreciation rate is about 4 percent per year, and the capital-output ratio is about 2.5. Suppose that the production function is Cobb-Douglas and that the United States has been in a steady state. (For a discussion of the Cobb-Douglas production function, see Chapter 3.) a. What must the saving rate be in the initial steady state? (Hint: Use the steady-state relationship, sy = (8 + 11 + g)k.] b. What is the marginal zadect of capital in the initial steady statei c. Suppose that public policy alters the saving rate so that the economy reaches the Golden Rule level of capital. What will the marginal product of capital be at the Golden Rule steady state? Compare the marginal product at the Golden Rule steady state to the marginal product in the initial steady state. Explain. d. What will the capital-output ratio be at the Golden Rule steady state? (Hint: For the Cobb-Douglas production function, the capital-output ratio is related to the marginal product of capital.) e. What must the saving rate be to reach the Golden Rule steady state?

Answers

(3) Sy=C6+m+8). 0.3 0-7 K L K.L LL 0-3-0-3 Kレ 3 K K -3 11 K (6+)E) CaO 7X 2.5 0.175 (b) Kニ25 0.3 6-17 K 0.0 7K o.7 K D.Z -d-4Goldm Hati S+3 MPK 3 0.07 K 4.28 4.27 S.427 o.07 X7.18 4.27 O13 1310 .3 4 28 0.07 1 MPr us than stet Golden Sull dteady tho i

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