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傳統理論用預期效用來解釋賭博和保險,結果卻導出無數的矛盾例子。它對邊際效用遞增的依賴也違反了基本的經濟原則,而它對不公平的遊戲或保險的無法拒絕更是危險的。本書提出了符合經濟學的新理論:它維護了邊際效用遞減的基礎、解釋了賭博、並展示如何拒絕不公平的遊戲和保險。更重要的是,它證明了根本沒有預期效用這回事。