Answer to Question #142335 in Finance for Mr. Dinesh Pal Singh

Question #142335
41. The demand equation for a product is given by
Q = (20I) / (P), where I is income and P is price.
i) Write an equation for the point price elasticity. For what values of I and P demand is unitary elastic? Explain.
ii) Write an equation for the point income elasticity. For what values of I and P is the good a necessity? Explain.
1
Expert's answer
2020-11-12T17:27:19-0500

When proportionate or percentage change in quantity demanded is exactly equal to proportionate or percentage change in price, then the demand will be said to be unitary elastic.

i) An equation for the point price elasticity will be


ii)  If the percentage change in quantity demanded is less than the percentage increase in income, the value is less than unity then the good will be termed as a necessity.

Therefore,


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