Income Elasticity of Demand
What it is:
How it works (Example):
The formula for incomeis:
Incomeincome)= (% change in quantity demanded) / (% change in
An example of a product with positive income elasticity could be Ferraris. Let's say the economy is booming and everyone's income rises by 400%. Because people have extra money, the quantity of Ferraris demanded increases by 15%.
We can use the formula to figure out the income elasticity for this Italian sports car:
Income Elasticity = 15% / 400% = 0.0375
An example of a good with negative income elasticity could be cheap shoes. Let's again assume the economy is doing well and everyone's income rises by 30%. Because people have extra money and can afford nicer shoes, the quantity of cheap shoes demanded decreases by 10%.
The income elasticity of cheap shoes is:
Income Elasticity = -10% / 30% = -0.33
Why it Matters:
As an income. In most cases, the demand for goods and services is likely to increase as well.grows and expands, people enjoy a rising
As incomes rise, demand for income elastic goods/services increase because people have more to spend. Income elastic goods include luxuries like airline travel, movies, restaurant meals and automobiles.
As income rises, demand for income inelastic goods/services tends to increase only marginally. Consumer staples like toothpaste and "sin" items like tobacco and alcohol tend to fall into this category.
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Finally, a good/service with negative incomeinferior good. In many parts of the world, bicycles are an inferior good. As income rises, demand for bicycles decreases as people trade up to cars.is known as an