基礎ECON-DEMA-002
Which of the following will cause a rightward shift in the demand curve for a normal good?
A. A decrease in consumers' income
B. An increase in the price of a substitute✓ 答案
C. A decrease in the price of the good itself
D. An increase in the price of a complement
解說
A higher substitute price makes this good relatively cheaper, so consumers switch to it and demand increases (rightward shift). A: lower income reduces demand for a normal good (leftward shift). C: a change in the good's own price causes a movement along the demand curve, not a shift. D: since complements are consumed together, a higher complement price reduces demand for this good (leftward shift).