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Income Elasticity of Demand

`IE_D = ( CD )/( CI )`
`(CD)"Percentage Change in Quantity Demand"`
`(CI)"Percentage Change in Income"`

The Income Elasticity of Demand calculator computes the income elasticity of demand based on the change in quantity of demand and the change in income.

INSTRUCTIONS: Enter the following:

Income Elasticity of Demand (IED):  The elasticity is returned as a real number.  However, this can be converted to a percentage via the pull-down menu.

The Math / Science

The formula for Income Elasticity of Demand is:

     EID = CD/CI

where:


Macroeconomics Calculators

The Math / Science

The formula for Income Elasticity of Demand is:

      IED = CD / CI

where:

The Income Elasticity of Demand formula computes the ratio of change in demand over change in consumer income.  Income Elasticity of Demand measures how the demand of a product or service changes with changes in consumer income. This is calculated by taking the percentage change in the demand quantity and dividing by the percentage change in income.  Note: the Income Elasticity of Demand is rounded to the nearest 1/1,000th.

Reference:

  • Mankiw, N. Gregory. "Chapter 5:Other Demand Elasticities." Principles of Macroeconomics. 6th ed. Mason, OH: Thomson/South-Western, 2004. 97. Print.
  • “Chapter 7 Consumer Choice and Elasticity.” AP Microeconomics 2018, by Eric R. Dodge, McGraw Hill Education, 2017.