中等econ-u02-d03
The cross price elasticity of demand between coffee and tea is positive. This tells us that coffee and tea are:
A. Substitutes✓ 答案
B. Complements
C. Independent goods
D. Always inferior goods
解說
A positive cross elasticity means the price of one good and demand for the other move in the same direction, which is the substitute relationship. Complements give a negative cross elasticity.