英语翻译在线等,有好答案马上采纳

英语翻译在线等,有好答案马上采纳
Before we detail the specific equations, we discuss issues related to the
inclusion of the shipping fee covariates.
For the empirical specification, we do not use the shipping
fees directly as covariates. Instead, we use a specification
designed to account for the two-part pricing and order size
incentive aspects.

在我们详细具体的方程,我们讨论的运输费用,协变量包括相关的问题.对于实证规范,我们不使用海运费直接作为协变量.相反,我们使用一个规范的设计考虑到两部定价和订单规模激励方面.