题目
A report on long-term stock returns focused exclusively on all currently publicly traded firms in an industry is most likely susceptible to:
选项
A.look-ahead bias.
B.survivorship bias.
C.intergenerational data mining.
答案
B
解析
： B is correct. A report that uses a current list of stocks does not account for firms that failed, merged, or otherwise disappeared from the public equity market in previous years. As a consequence, the report is biased. This type of bias is known as survivorship bias. ： B正确。 一份使用当前股票清单制作的报告并不包括前几年倒闭、合并或以其他方式从公开股票市场消失的公司。因此，这份报告是有偏见的。这种类型的偏差被称为生存偏差。