1.2.3 - PED, YED, XED, PES Flashcards
When ped = 0 demand is
perfectly inelastic
when ped > 1 demand is
demand is price elastic
When ped < 1 demand is
demand is price inelastic
When ped = 1
demand is unit price elastic
necessities have a YED of
0
what is yed
Income elasticity of demand, Relationship between a change in consumers income and quantity demanded.
luxury goods have a yed of
> 1
YED < 0 the good is a
inferior good
What is the formula for XED
%Change in demand of good A / %Change in price of good B
What is PES
How much quantity supplied changes in response to a change in price.
can pes be negative
no ALL PES are positive.
If xed is > 1 the good is ..
cross price elastic
if xed is < 1 the good is
cross price inelastic
factors affecting pes (4)
time scale
spare capacity
level of stocks
barriers to entry of market
if pes is > 1
supply is elastic