A while back I did a lit review on the correlation between grades and teacher evaluations. I remember being surprised at how little of a correlation economists

A while back I did a lit review on the correlation between grades and teacher evaluations. I remember being surprised at how little of a correlation economists found between the two variables. Based on my memory, things like teacher personality, teacher nationality, grade variance, and class size matter a lot. Didn't pg have an essay about how "Turns out" is a euphemism for I'm too lazy to provide evidence?