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Income Elasticity of Demand

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Income Elasticity of Demand
A measure of whether a good is considered a necessity or a luxury. It is measured as a ratio of the change in demand for a good to the change in consumer income. Demand for a necessity tends to change slowly with changes in income; that is, as consumers become wealthier, they do not necessarily buy more of a necessity because they already have all they need. On the other hand, demand for luxury increases quickly with increases in income, as consumers buy more of a luxury when they become wealthier.


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Luxury items such as cars are said to have high income elasticity of demand, which means that as people become poorer, they will spend less and less for the goods that are not absolutely essential for functioning of the household.
As shown in Fogel 1999, both education and health care have a long-run income elasticity of demand greater than 1.
These GETS estimates of the coefficients in the ECM part imply that the income elasticity of demand for money is 0.
 
 
 
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