> Given that one small element of interview presentation has been shown to involve irrational bias No such thing was shown in this study. The study makes no at

> Given that one small element of interview presentation has been shown to involve irrational bias No such thing was shown in this study. The study makes no attempt to measure E(skills | social class). For all we know, the hiring managers provided an unbiased (i.e. the opposite of "irrational bias") estimate of the expected skills conditioned on the social class of the applicant, absent any other information.