中等ECON-ELAS-016
A 10% rise in consumers' incomes leads to a 5% fall in demand for instant noodles. Instant noodles are:
A. A normal good with income elasticity 0.5
B. A normal good with income elasticity 2
C. An inferior good with income elasticity -0.5✓ 答案
D. An inferior good with income elasticity -2
解說
Demand falls when income rises, so the good is inferior. Income elasticity = -5%/10% = -0.5.