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I think labor force participation is the other big one (and this holds true for low-SES Americans of all racial backgrounds).
Optimistically, on the education front, Success Academy has average SAT scores in the 1280s. A good pedagogy and edu environment can do immense good.
What aspects of SA's enrollment procedures might cause them to select a more able crop of kids from the get-go? My immediate hunch is that the apparent success of some of these schools is driven as much by who attends rather than what the school does.
Lots of people are forced out of success academy. I'm sure they push out the kids who have low test scores. But these kids have to go somewhere you know.
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