最近，一份来自伯克利hass商学院的有分量的研究称，有12%的易趣收入间接的来自Google，然而Google却只从易趣那里获得了这部分收入的3%。
An influential recent study from Berkeley's Haas School of Business estimated that about 12% of eBay's revenues come indirectly from Google, whereas Google gets only 3% of its revenues from eBay.
在多元回归模型建立的过程中，由于各个变量的测量单位不相同，多元回归模型无法正确地评估出各个分量对预测值直接的和间接的影响。
The model of multi-regression cannot correctly distinguish the direct and indirect effects from different components in the process of building because the measuring units have differences.
通过附有条件的间接平差模型进一步证明各类方差-协方差分量估计公式之间的等价性。
In this paper, through the model of parameter adjustment with constraints among the parameters, a further proof on the equivalence of the formulas of variance-covariance components is gives.
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