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Question-3 (Marginal Products and Returns to Scale) (30 points) Suppose the production function is Cobb-Douglas and f(x1; x2) = x1^1/2 x2^3/2

1. Write an expression for the marginal product of x1.

2. Does marginal product of x1 increase for small increases in x1, holding x2 fixed? Explain

3. Does an increase in the amount of x2 lead to decrease in the marginal product of x1? Explain

4. What is the technical rate of substitution between x2 and x1?

5. What is the type of returns to scale of this production function? (Increasing, decreasing, constant)

Question-3 (Marginal Products and Returns to Scale) (30 points) Suppose the production function is Cobb-Douglas and 1/2 3/2 f

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Answer #1

flsel, d22) , = 12 312 XI mle = 2f (ser, *2) axel =(x,V2 yeye 312) coser -1/2 3/2 M2 - / sel As al 9 Increases, Marginal Marg21 x2 = 112 3/2 flopper) fffxv, t>ca) = (tor) 44 tone)! = + 12 x 1/2 t t floor, ay) Guareasing returns to scale 3/2 3/2 212

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