Section 9 Flashcards
Substitution Effect
the change in the price of a good is the change in the quantity of that good demanded as the consumer substitutes the good that has become relatively more expensive
Income Effect
The change in price of a good is the change in the quantity of the good demanded that results from a change in the consumer’s purchasing power when the price of the good changes.
Giffen Goods
Good that has a demand slope upward not downward
Inferior good
a good for which demand increases when income falls
Price Elasticity of Demand
the ratio of the percent change in quantity to the percent change in the price dropping the minus sign
Midpoint method
%change in QD over %change in Price
***When doing the % change its New-Old over Average of both
Demand is Perfectly Inelastic
the Quantity demanded does not respond at all to the changes in the price
Vertical line, Slope is undefined
Demand is Perfectly Elastic
Any price increase will cause the quantity demanded to drop to zero. Horizontal line Slope is 0
Elasticity of demand- Relatively Elastic
if the Price elasticity of demand is greater than one
Elasticity of demand- Relatively Inelastic
If the Price Elasticity is less than one
Elasticity of demand- Unit-elastic
If the Price Elasticity id exactly one
Total Revenue
Total Value of the sales of a good or service. It is equal to the price multiplied by the quantity sold.
What factor determine the price
Close substitutes
Necessity or a Luxury
Share of Income
Time
Cross-price elasticity of demand
the effect of change in one good’s price on the quantity of the other good. It is equal to the percent change in QD of one good decided by the percent change in the other good’s price.
Income Elasticity of Demand
is the percent change in the quantity of a good demanded when a consumer’s income changes divided by the percent change in the consumer’s income.