Suppose the production function for widgets is given by: Q = f (K, L) = 2 ∗ KL − K2/2 − L2/2 (a)  Suppose L=5 (is fixed), derive an expression for and graph the total product of capital curve (the production function for a fixed level of labor) and the average productivity of capital curve. (b)  At what level of capital input does the average productivity reach a maximum? How many widgets are produced at this point? (c)  Again, assuming L=5, derive an expression for and graph the MPK curve. At what level of capital input does MPK =0? (d)  Does this production function exhibit constant, increasing or decreasing returns to scale?

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter9: Production Functions
Section: Chapter Questions
Problem 9.2P
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Suppose the production function for widgets is given by:

Q = f (K, L) = 2 ∗ KL − K2/2 − L2/2

  1. (a)  Suppose L=5 (is fixed), derive an expression for and graph the total product of capital curve (the production function for a fixed level of labor) and the average productivity of capital curve.

  2. (b)  At what level of capital input does the average productivity reach a maximum? How many widgets are produced at this point?

  3. (c)  Again, assuming L=5, derive an expression for and graph the MPK curve. At what level of capital input does MPK =0?

  4. (d)  Does this production function exhibit constant, increasing or decreasing returns to scale?

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