PED Flashcards
PED
%change in quantity demanded/ % change in price
A price elasticity of demand is usually..
Negative because demand falls as price increases for most goods
Elastic (relatively elastic) demand number
PED>1
% change in price will cause a larger % change in quantity demanded
The higher the value of PED
The more elastic demand is for the good
If the PED is -7.5
This means that a 1% change in price leads to a 7.5% change in demand
Perfectly elastic demand has a PED of
Infinity and any increase in price means that demand will fall to zero; consumers are willing to buy all they can obtain at P but none at a higher price.
Inelastic (relatively inelastic) demand number
0
Perfectly inelastic demand has a PED of
0 and a change in price will have no effect on the quantity demanded
Unit elasticity of demand number
+-1
If the size of the % change in price is equal to the size of the percentage change in quantity demanded e.g. A 20% decrease in price will lead to a 20% increase in quantity demanded