Cross Price Elasticity of Demand Flashcards
What is CPED?
CPED measures the % change in quantity demanded for a product following the % change in price of a related good.
What is the formula for CPED?
% change in P of good y
What CPED value do unrelated goods have?
0
What classes of goods have CPED values?
Substitutes and complements
What does SAPCAN mean?
Substitutes are positive
Complements are negative
What type of demand are substitutes?
Competitive demand
What CPED value do substitutes have?
Positive
What does a CPED value of >1 mean?
Products are strong substitutes
Perfect replacements
Cross price elastic
What does a CPED value of <1 mean?
Products are weak substitutes
Imperfect replacements
Cross price inelastic
What type of demand do complements have?
Joint demand
Is the CPED value for complements positive or negative?
Negative
What does a CPED value of < -1 mean?
Negatively cross price elastic
Products are strong complements
Demand for one of the products is very likely to lead to demand for the other
What does a CPED value of 0 to -1 mean?
Negatively cross price inelastic
Products are weak substitutes
These are products that can be used together but they don’t need to be, and can be used equally well separately or with another product.