試題詳解

11. (5%) Use the midpoint method to calculate the percentage change in unit price and total expropriation quantity for facial masks before and after January 1, 2021, and then use your answers to calculate the elasticity of demand, assuming the total amount expropriated by the Taiwanese government is the actual quantity demanded for each price, holding other things equal. Which of these statements are true?
(A)The percentage change in unit price has a magnitude smaller than 20%.
(B)The percentage change in total expropriation quantity for facial masks is greater or equal to 40%.
(C) The elasticity of demand for facial masks has a magnitude smaller than 2.
(D) The demand for facial masks is inelastic.
(E) None of the above.