試題詳解

5. Which of the following is consistent with the elasticities given in Table 2?
(A) A is a luxury and B is a necessity.
(B) A is a good after an increase in income and B is that same good after a decrease in income.
(C)A has fewer substitutes than B.
(D) A is a good immediately after a price increase and B is that same good three years after the price increase.