Oil is a very important asset, ... so we want to compute what that-- so now we have lots of inputs.

石油是一种重要的资产，我们想计算-,现在我们有许多参数。

耶鲁公开课 - 金融市场课程节选

He estimates, for his purposes, and he shows you calculations of the efficient portfolio frontier.

他用自己的角度估算了参数,他还给出了计算有效边界的方法。

耶鲁公开课 - 金融市场课程节选