Tiffany's company has the production function Q=2K^0.5L^0.5, where Q measures output, K measures machine hours, and L measures labor hours. Let the wage rate be W, and suppose that the rental rate of capital is R=$20 and the firm wants to produce 400 units of output. Use the Lagrange method to find the demand curve for labor as a function of the wage rate. Your answer will have L on the left hand side of the equation. On the right hand side, you will have a constant multiplied by W raised to an exponent
-What is the exponent on W? (Note that the exponent is a negative number, so make sure to enter the exponent including the negative sign.)
-What is the constant number on the right hand side of the equation?
Total Cost is given by
TC=WL+20R
Production function is given by
Q=2K0.5L0.5
Set Q=400
400=2K0.5L0.5
We need to minimize Cost i.e.
Minimize TC=WL+20*L
subject to
400=2K0.5L0.5
Lagrange is given by
First order conditions give us
or
or
Divide equation (1) by equation (2) we get
W/20=K/L
K=WL/20
Set K=WL/20 in equation (3) we get
2*(WL/20)0.5L0.5=400
(W/20)0.5*L=200
L=200*200.5/W0.5
L=894.4272*W-0.5
-What is the exponent on W?
Exponent on W=-0.5
-What is the constant number on the right hand of equation
894.4272
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