survivorship bias

基本解释

So the survivorship bias and the backfill bias would be much,much more of a problem in the hedge fund world.
所以生存偏差和廻填偏差,會是對沖基金領域裡一個相儅重大的問題
So,the combination of survivorship bias and backfill bias for that one year made 4.3 percentage points difference.
因此在生存偏差和廻填偏差的共同作用下,造成了兩個收益率之間4.3%的差值
Now,more than 130 managers failed because, in addition to survivorship bias, there's something called backfill bias.
其實失敗的經理人超過130位,因爲除了生存偏差之外,還有稱爲廻填偏差的影響

So the survivorship bias and the backfill bias would be much,much more of a problem in the hedge fund world.
所以生存偏差和廻填偏差,會是對沖基金領域裡一個相儅重大的問題
耶魯公開課 - 金融市場課程節選
Looking at this particular group, he estimated survivorship bias to be 4.4% per year and backfill bias to be 7.3% per year.
分析這個特定的樣本,他估算其生存偏差每年達到4.4%,廻填偏差每年達到7.3%
耶魯公開課 - 金融市場課程節選
Then if you adjust for survivorship bias, you end up concluding that the deficit wasn't .3% but the deficit was actually 2%.
那麽如果你算上生存偏差,你會發現,缺口不是0.3%,事實上是2%
耶魯公開課 - 金融市場課程節選

This so-called "survivorship bias" skews returns simply because more losers are eliminated from the sample.
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