Nit: giving IQ tests is not super cheap, because it puts companies at a nebulous risk of being sued for disparate impact (see e.g. https://en.wikipedia.org/wiki/Griggs_v._Duke_Power_Co.).
I agree with all the major conclusions though.
For a long time, this was my impression as well, but Caplan claims the evidence doesn’t bear this out. And many organizations do use IQ testing successfully; the military is a prime example.
Nit: giving IQ tests is not super cheap, because it puts companies at a nebulous risk of being sued for disparate impact (see e.g. https://en.wikipedia.org/wiki/Griggs_v._Duke_Power_Co.).
I agree with all the major conclusions though.
For a long time, this was my impression as well, but Caplan claims the evidence doesn’t bear this out. And many organizations do use IQ testing successfully; the military is a prime example.