| Note: I am not agreeing nor disagreeing with the article. I'm only clarifying what it's trying to say The article is about the fact that school does not show that "developer ... is signaling that he is reliable and comes to work every day" The whole point of the article is there is zero correlation between people who've graduated from college and people who haven't in term of how well they do on the job. It sounds counter intuitive. There's like 3 situations 1. College trains you more than non-college 2. College doesn't train you but shows you're willing to stick things out more than people who didn't go 3. College does nothing what-so-ever (no difference in job performance from hiring people who did or didn't go to college) The author of the article is claiming 100 years of research has shown it's #3. People will let you in the door because you have the paper (diploma) but they are fooling themselves that that paper has any meaning relative to hiring people without that paper Here's another interview with the same author http://www.econtalk.org/bryan-caplan-on-the-case-against-edu... again, I am not agreeing nor disagreeing with the article. I'm only clarifying what it's trying to say Let me add though, the author is claiming this is true in aggregate. Not for your personal anecdote. |
... among the population who have been hired to do the job. This is conditioning on the collider. The people without a degree who got in are a highly selected sample compared to all people without degrees. Anyone who used this to argue that a degree wasn’t a strong useful signal Wouk be making the same mistake as those trying to get rid of the GRE in graduate admissions because in the population admitted the GRE doesn’t predict anything. If it did that would show under or overweighting ofbthe signal it sends. Zero correlation shows it has been given appropriate weight.