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.
所以生存偏差和回填偏差,会是对冲基金领域里一个相当重大的问题
So,the combination of survivorship bias and backfill bias for that one year made 4.3 percentage points difference.
因此在生存偏差和回填偏差的共同作用下,造成了两个收益率之间4.3%的差值
Now,more than 130 managers failed because, in addition to survivorship bias, there's something called backfill bias.
其实失败的经理人超过130位,因为除了生存偏差之外,还有称为回填偏差的影响

So the survivorship bias and the backfill bias would be much,much more of a problem in the hedge fund world.
所以生存偏差和回填偏差,会是对冲基金领域里一个相当重大的问题
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Looking at this particular group, he estimated survivorship bias to be 4.4% per year and backfill bias to be 7.3% per year.
分析这个特定的样本,他估算其生存偏差每年达到4.4%,回填偏差每年达到7.3%
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Then if you adjust for survivorship bias, you end up concluding that the deficit wasn't .3% but the deficit was actually 2%.
那么如果你算上生存偏差,你会发现,缺口不是0.3%,事实上是2%
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This so-called "survivorship bias" skews returns simply because more losers are eliminated from the sample.
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