XED&YED (L15) Flashcards
Formula for cross price elasticity of demand (XED)
Percentage change in quantity demanded of product A/ percentage change in price of product B
What does XED measure
Responsiveness of demand for one good to changes in price of another good
Substitute goods
Positive XED
Complement goods
Negative XED
XED of unrelated goods
0
Income elasticity of demand (YED) formula
Percentage change in quantity demanded/ percentage change in income
What happens to the demand of a normal good when income increases
Demand increases
What happens to the demand of an inferior good when income decreases
Demand increases
Inferior goods have a ____ YED
Negative
Normal goods have a _____ YED
Positive
Interval of YED for an income inelastic normal good
0 and 1
what are income inelastic normal goods classed as
Necessities
Describe the income elasticity of a normal good with a YED larger than 1
Income elastic
What type of good is an income elastic normal good
Luxury
> (PED)
Inelastic