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ONE From Equal Opportunity to Equal Results
TWO Inequality in the Schools
THREE Inequality in Cognitive Skills
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ability achievement adopted children adult AFQT scores alleles American Appendix aspirations assortative mating assume average blacks and whites bottom fifth Census Chapter child children reared coefficient of variation cognitive inequality cognitive skills curriculum desegregation differences distribution Duncan earnings economic economic inequality educational attainment EEOS effect elementary schools environment environmental epistasis equal equation estimate evidence example expenditures explain factors family background father's education father's occupation Figure B-7 fraternal twins genes genetic genotype groups heritability high school high-status identical twins implies income individuals influence IQ scores Jencks Jensen's formula less males mean measurement error middle-class ninth grade observed correlation occupational status overall percent population Project Talent racial random reduce relationship reported sample segregation siblings social socio-economic standard deviation Stanford-Binet studies survey Table teachers test scores tion top fifth total variance true correlation twelfth grade U.S. Bureau unrelated children variables weighted mean workers working-class