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In page Business ethics:

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Business ethics is related to philosophy of economics, the branch of philosophy that deals with the philosophical, political, and ethical underpinnings of business and economics.[1] Business ethics operates on the premise, for example, that the ethical operation of a private business is possible—those who dispute that premise, such as libertarian socialists (who contend that "business ethics" is an oxymoron) do so by definition outside of the domain of business ethics proper.[citation needed]