The average truncation effect is computed as lambda×[average mills value] = 0.141×1.117 = 0.157. This gives by how much the conditional wages are shifted up (or down) due to the selection or truncation effect.


这是从别人文档里面copy的一段话。老师让我算算selection effect， 不知道有没有童鞋清楚stata里面怎么算这个呢？


先谢过了~~