By Charles A. Murray
This paintings examines the connection among financial inequality and Intelligence Quotient (IQ), to work out how a lot of saw source of revenue inequality is caused by adjustments in incomes features which are heavily linked to transformations in cognitive skill.
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Additional info for Income Inequality and IQ
Example text
In this monograph as in The Bell Curve, the middle of the five classes is deliberately set to include half the population, reflecting our contention that the most important relationships between IQ and economic and so cial phenomena occur at the tails of the distribution. This is not intended to reflect a specific hypothesis of nonlinearity, but to focus attention on the large differences that characterize groups at the tails of the distribution. 3. The NLSY systematically oversampled blacks, Hispanics, and low-income whites.
Rowe, W. J. Vesterdal, and J. L. Rodgers, "Herrnstein's Syllogism: Common Genetic and Shared Envi ronmental Influences on IQ, Education, and Income," Univer sity of Arizona ( 1997). 13. In addition to the Plomin and Rowe books, see, for exam ple, J. L. Rodgers and D. C. Rowe, "Does Contiguity Breed Simi larity? A Within-Family Analysis of Nonshared Sources of IQ Differences between Siblings," Developmental Psychology 2 1 ( 1985): 743-46 ; L . H . Cyphers, D. W . Fulker, et al. , "Cognitive Abilities in the Early School Years : No Effects of Shared Envi ronment between Parents and Offspring," Intelligence 13 ( 1989): 369-86; and D.
See The Bell Curve, pp. 123-24 and 286-87. 7. More precisely, they believed themselves to be the chil dren of the same biological parents. The NLSY coding distin guishes between sibling and step sibling or adoptive sibling. As an additional screen, I prepared profiles for each subject based on the question that asks whether the subject was living with his or her parents at various ages, requiring that both members of a sibling pair reported living with their parents at birth and that the older sibling had consistently reported living with both parents in all the years up to and including the birth year of the younger sibling.