學校小考的題目 可是想不出是為什麼 Suppose that Martin owns a lighthouse, and Lewis owns a bearby port. Martin's lighthouse benefits only those ships that enter Lewis's port. Which of the following statements is "not" correct? A. Martin's lighthouse may be considered a private good. B. Martin can reduce the free-rider problem by charging Lewis a usage fee. C. Martin can exclude Lewis's port form benefiting from the lighthouse by simply truning the power off. D. Martin's lighthouse may be considered a common resource. 答案是d 不過我不知道d錯在哪? 我覺得a也是錯的 感覺應該是無法排它 也不具敵對性 想請高手幫忙解答一下 謝謝~ --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 125.225.69.85 ※ 編輯: spotnec 來自: 125.225.69.85 (07/13 00:16)