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金融民工阿聪 · 2021年04月28日

Truncation bias

NO.PZ2016072602000007

问题如下:

Randy Bartell has collected operational loss data to calibrate frequency and severity distributions. Generally, he regards all data points as a sample from an underlying distribution and therefore gives each data point the same weight or probability in the statistical analysis. However, external loss data is inherently biased. Which of the following is not typically associated with external data?

选项:

A.

Data capture bias

B.

Scale bias

C.

Truncation bias

D.

Survivorship bias

解释:

D is correct. Internal data certainly has a problem of survivorship bias because a bank where employees compute the operational risk distribution is still alive. This precludes a history of large, deadly losses.

Truncation bias可以理解为threshold选择大小导致的偏差吗?

1 个答案
已采纳答案

袁园_品职助教 · 2021年04月28日

Truncation bias大意是去掉一些尾部数据,是可以理解为低于某个threshold就不计入在内