Answer to Question #134821 in Microeconomics for ouoba

Question #134821
Suppose a firm finds that the marginal product of capital is 60 and the marginal product of labor is 20. If the price of capital is $6 and the price of labor is $2.50, describe how the firm should adjust its mix of capital and labor? What will be the result?
1
Expert's answer
2020-09-24T11:03:33-0400

solution

given that

marginal product of capital(MPK)=60

marginal product of labor (MPL)=20

wage rate(w)=2.50$

price of capital(r)=6$


for a firm employing labor and capital as input then best combination occur at


MPLW=MPKr\frac{MPL}{W}=\frac{MPK}{r}


so

MPLW=202.50\frac{MPL}{W}=\frac{20}{2.50}\\\\\\


MPLW=8\frac{MPL}{W}=8


and


MPKr=606\frac{MPK}{r}=\frac{60}{6 }


MPKr=10\frac{MPK}{r}=10


so we can see that


MPLW<MPKr\frac{MPL}{W} <\frac{MPK}{r}\\


8<108<10




so to attain the best input mix , the firm should hire more labor and hire lass capital so that marginal product of labor increase and marginal product of capital reduces until the equilibrium

is attained.





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