Calculating elasticity of substitution help

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SUMMARY

The discussion focuses on calculating the elasticity of substitution between two goods, x and y, using the production function F(x,y) = 10x² + 15y². The Marginal Rate of Substitution (MRS) was calculated as 20x/30y. To find the elasticity of substitution, the formula used is 1/(1-ρ), where ρ represents the power in the production function. The correct elasticity of substitution, as indicated in the book, is -1.

PREREQUISITES
  • Understanding of Marginal Rate of Substitution (MRS)
  • Familiarity with elasticity of substitution concepts
  • Knowledge of production functions in economics
  • Basic algebra for manipulating equations
NEXT STEPS
  • Study the derivation of the elasticity of substitution formula 1/(1-ρ)
  • Explore different types of production functions and their properties
  • Learn about the implications of elasticity of substitution in economic theory
  • Practice calculating MRS and elasticity of substitution with various functions
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Economics students, researchers in microeconomic theory, and anyone interested in understanding the relationship between goods in production functions.

bart11
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Calculate the elasticity of substitution between y and x for F(x,y) = 10x^2 + 15y^2

I was able to calculate the Marginal Rate of Substitution as 20x/30y but I'm not sure how to proceed past that. The answer in the book is -1. Any and all help appreciated!
 
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bart11 said:
Calculate the elasticity of substitution between y and x for F(x,y) = 10x^2 + 15y^2

I was able to calculate the Marginal Rate of Substitution as 20x/30y but I'm not sure how to proceed past that. The answer in the book is -1. Any and all help appreciated!

denote rho as the power.

Then elasticity of substitution is

$\dfrac{1}{1-\rho}$

If the power is different, you would have to use the formula.
 
dwsmith said:
denote rho as the power.

Then elasticity of substitution is

$\dfrac{1}{1-\rho}$

If the power is different, you would have to use the formula.

Sorry but I'm not sure if I follow. Rho? And I believe the book taught us using the formula so I may be a little confused. Thanks for the help!
 

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