Vote counting in a meta-analysis/research review? What is this, 1975?
Comical. RAND corp. produced a 300+ page report arguing that early intervention programs are effective and have positive cost-benefit ratios. There's only 1 mention of "publication bias". https://www.rand.org/pubs/research_reports/RR1993.html …pic.twitter.com/RrcMSBBj1z
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¯\_(ツ)_/¯ Authors emphasize how well the programs work for lifelong outcomes, but their own table shows that 68% of the programs' outcomes were "NULL" by their own criteria. That doesn't sound very successful to me.
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Proponents of universal pre-K are resting their hopes on long-term "sleeper" effects that don't show up until adolescence. What puzzles me is HOW going to preschool will make a teenager decide to not drop out of HS. What on earth is this causal mechanism?
End of conversation
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This is sad, given RAND's history.
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