# Answer to Question #51688 in Macroeconomics for Johanna Titus

Question #51688

At L=4, k=4, the marginal product of labor is 2 and the marginal product of capital is 3. what is the marginal rate of substitution?

Expert's answer

At L=4, K=4 MPl = 2, MPk = 3.

Marginal Rate of Technical Substitution (MRTS) is the amount by which the quantity of one input has to be reduced when one extra unit of another input is used, so that output remains constant. MRTS(K, L) = MPk/MPl = 2/3 = 0.67

So, the marginal rate of technical substitution is 0.67.

Marginal Rate of Technical Substitution (MRTS) is the amount by which the quantity of one input has to be reduced when one extra unit of another input is used, so that output remains constant. MRTS(K, L) = MPk/MPl = 2/3 = 0.67

So, the marginal rate of technical substitution is 0.67.

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