Question

Suppose that Jennifer produces good y by using input xi and x2. The production function which Jennifer faces is: y = x} + x3

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Answer #1

(a)

Let output price be p. Then

Revenue (R) = py = p.(x11/2 + x21/2)

Cost (C) = F + w1.x1 + w2.x2

Cost minimization problem is:

Minimize C = F + w1.x1 + w2.x2

Subject to: R = p.(x11/2 + x21/2)

w1 > 0, w2 > 0, x1 > 0, x2 > 0, F > 0

Cost is minimized when MP1/MP2 = w1/w2

MP1 = \partial y/\partialx1 = (1/2) / (x11/2)

MP2 = \partial y/\partialx2 = (1/2) / (x21/2)

MP1/MP2 = [(1/2) / (x11/2)] / [(1/2) / (x21/2)] = (x2/x1)1/2 = w1/w2

Squaring,

x2/x1 = (w1/w2)2

So,

x1/x2 = (w2/w1)2

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