zlacker

>>azhenl+(OP)
This is Berkson's Paradox. Even if coding competition performance correlates positively with job performance in the general population (which it certainly does, given that most people can't code), selecting for this attribute in the hiring process leads to a negative correlation among those hired.

Great write-up by Erik Bernhardsson, CTO of Better, here: https://erikbern.com/2020/01/13/how-to-hire-smarter-than-the....

>>jaredt+g2
That write up is excellent and I found this paragraph particularly interesting.

> An interesting paper [1] claims a negative correlation between sales performance and management performance for sales people promoted into managers. The conclusion is that “firms prioritize current job performance in promotion decisions at the expense of other observable characteristics that better predict managerial performance”. While this paper isn't about hiring, it's the exact same theory here: the x-axis would be something like “expected future management ability” and the y-axis “sales performance”.

[1] https://www.nber.org/papers/w24343.pdf