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Your objection shouldn't be so lightly dismissed. It's possible that merely being placed in an environment populated with other students whose parents are suppo
by vannevar 12y ago
Your objection shouldn't be so lightly dismissed. It's possible that merely being placed in an environment populated with other students whose parents are supportive is enough to account for the gains. The students who failed to win the lottery were placed back into a general population whose influence (direct and indirect) could be the reason for their poor performance relative to the charter school kids.
- vinhboy 12y agoI didn't reply to the others because I didn't want to get into a whole fight about it. But the OP's original message about selection-bias is still correct. The article's original claim is that charter schools does work for disadvantage and black students. But that is NOT what the data supports. The data supports that it works for disadvantaged and black students who have active parents. That conclusion raises more questions than it answers. I think your theory makes a lot of sense. Thank you for sharing that.