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middle grades » middle ages
middle name » middle names, middle game, middle nile
middle age » middle ages, middle aged
middle grades » middle ages
middle name » middle names, middle game, middle nile
middle age » middle ages, middle aged
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How much do 15-year-olds learn over one year of schooling? An international comparison based on PISA
“... regulations are used as an exogenous source of variation for grade levels in an instrumental- variables...”
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by Lux, Linda J., Boehlecke, Brian A., Lohr, Kathleen N.
Published 2004
Published 2004
Agency for Healthcare Research and Quality
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by Lux, Linda J., Boehlecke, Brian A., Lohr, Kathleen N.
Published 2004
Published 2004
Agency for Healthcare Research and Quality
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