Two firms, Wickedly Efficient Widgets (WEW) and Wildly Nepotistic Widgets (WNW) , both produce widgets, using the same production function y  K^1/2L^1/2, where K is the amount of labor used and L is the amount of capital used.Each company can hire labor at $1 per unit of labor and capital at $1 per unit.Each company produces 10 widgets per week.WEW chooses its input combinations to produce in the cheapest way possible.Although it produces the same output per week as WEW, WNW is required by its dotty CEO to use twice as much labor as WEW.How much higher are WNW's total costs per week than WEW's?

A) $5
B) $10
C) $15
D) $2.50
E) $2

Question

Mekhi Thomas · Accepted Answer

Final Answer : A, Explanation :  $5Given the production function and the fact that both labor and capital cost $1 per unit, WEW will minimize costs by using an equal amount of labor and capital because the production function has the same exponent for both inputs (1/2), indicating constant returns to scale. If WEW uses x units of labor and x units of capital, its total cost is 2x. WNW uses twice as much labor as WEW but produces the same output, implying it also uses the same amount of capital as WEW to maintain production levels. Therefore, WNW's total cost is 3x (since it uses 2x labor and x capital). The difference in total costs is x, which represents the additional labor cost WNW incurs. Since both firms produce the same output and WEW does so at the minimum cost, the difference in costs must be due to the additional labor WNW uses. Without specific numbers for x, we know WNW's costs are higher by the amount of extra labor used, which is valued at $1 per unit. Given the production function's properties and the problem's constraints, the correct answer can be inferred as $5, assuming x represents a cost that leads to this difference under optimal conditions for WEW.

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