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Unformatted text preview: x (resp. MPy) increase, stay the same, or decrease, when x (resp. y ) increases?). Production functions MP x MP y MRTS x,y Returns to Scale Marginal Return to x Marginal Return to y 2x + 3y 2 3 x 1/2 y 1/2 y 1/2 / 2x 1/2 x 1/2 / 2y 1/2 x 1/4 y 1/4 y 1/4 / 4x 3/4 x 1/4 / 4y 3/4 x 2 y 2xy x 2 x + y 1/2 1 1 / (2y 1/2 ) 2. (20 points) A firm has a CobbDouglas production function Q = L 2 K 2 . The marginal products for this production function are: MP L = 2LK 2 , MP K = 2L 2 K. Suppose the price of labor is w = 10 per unit and the price of capital is r = 1 per unit. Find the costminimizing input choice if the firm wants to produce 121,000 units of output....
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 Spring '11
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