Assuming five races: Given that there are more than five schools, than using a s...

		jivatmanx on Nov 13, 2012 \| parent \| context \| favorite \| on: Firestorm Erupts Over Virginia's Education Goals Assuming five races: Given that there are more than five schools, than using a school's past score performance or socioeconomic status is going to be closer to their individual score than the aggregate for their race. tl;dr School is finer grained than race because there are more schools than races.

That only works when you are able to control for all other factors.