If there is profit or not under the competitive equilibrium, is the focus of the dispute between the New Classical Economics and the Questioner. Prof.

竞争性均衡条件下是否存在利润，是新古典经济学与质疑者争论的焦点。

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Prof Gamman admits that many companies - such as mobile phone manufacturers - profit from theft, as consumers have to replace their products after they are stolen.

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