In case of changing the single factor, the cost of marginal value should equal to its marginal profit.

在单一要素变动的情况下，边际价值成本应当等于边际价值收益。

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The difference of incentive intensity is affected by the factor of technology spillover, the marginal cost curve of enterprises' environmental management and the slope of marginal revenue curve.

激励强度差异受到技术外溢系数、企业环境管理边际成本曲线和边际收益曲线斜率的影响。

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