difference-in-difference 倍差法 ; 双重差分
Difference-in-Difference Model 双重差分模型
Difference-In-Difference Estimator 估计量
Difference-in-Difference matching approach 倍差匹配法
Difference-in-Difference approach 自然试验评估方法
She says people would not even notice a difference in taste with three grams, or one-half teaspoon, less salt per day.
VOA: special.2010.01.27
The poem's connection to music signifies the difference in point of view in these poems from reasoned speech.
这首诗和音乐的联系显示了,它和那些理由充分的演说在观点上的不同。
And the accounting unfortunately at that point in general wasn't really able to reflect that difference
然后总体来说在这点上很不幸,因为会计记帐不能反映出那些区别,
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