With the help of mathematical model, the paper employs the concept of external effect in economics and its relevant theory to explore the effects of foreign players on league utility.
引入经济学中外部效应的概念和理论，并借助于数学模型分析了外员使用对联赛效用的影响。
With the help of mathematical model, the paper employs the concept of external effect in economics and its relevant theory to explore the effects of foreign players on league utility.
引入经济学中外部效应的概念和理论，并借助于数学模型分析了外员使用对联赛效用的影响。
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