【題目】 Consumer surplus is: 解答 是哪个?
??? ① the price one is willing to pay divided by its actual price??? ② the difference between the substitution and income effect
??? ③ the difference between the price one is willing to pay and the price one has to pay
??? ④ negative for an inferior good the difference between the price one is willing to pay and the price one has to pay 謝謝解答
the difference between the price one is willing to pay and the price one has to pay
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