Bryan Caplan on the Case Against Education

I'm reading through the book now and the besides the signalling vs human capital argument the most interesting part is how he breaks down what college students are signalling into 3 parts that companies are interested in.

1. Intelligence - By passing tests 2. Conscientiousness - By doing it for 4+ years 3. Conformity - By not figuring out a way around it

It's an interesting exercise to think of how different careers might value these 3 factors plus human capital differently.