IQ and Family Background: Are Associations Strong or Weak?
AbstractFor the purpose of understanding the underlying mechanisms behind intergenerational associations in income and education, recent studies have explored the intergenerational transmission of abilities. We use a large representative sample of Swedish men to examine both intergenerational and sibling correlations in IQ. Since siblings share both parental factors and neighbourhood influences, the sibling correlation is a broader measure of the importance of family background than the intergenerational correlation. We use IQ data from the Swedish military enlistment tests. The correlation in IQ between fathers (born 1951-1956) and sons (born 1966-1980) is estimated to 0.347. The corresponding estimate for brothers (born 1951-1968) is 0.473, suggesting that family background explains approximately 50% of a person's IQ. Estimating sibling correlations in IQ, we thus find that family background has a substantially larger impact on IQ than has been indicated by previous studies examining only intergenerational correlations in IQ.
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Bibliographic InfoArticle provided by De Gruyter in its journal The B.E. Journal of Economic Analysis & Policy.
Volume (Year): 10 (2010)
Issue (Month): 1 (January)
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Web page: http://www.degruyter.com
Other versions of this item:
- Björklund, Anders & Hederos Eriksson, Karin & Jäntti, Markus, 2009. "IQ and Family Background: Are Associations Strong or Weak?," IZA Discussion Papers 4305, Institute for the Study of Labor (IZA).
- J0 - Labor and Demographic Economics - - General
- I0 - Health, Education, and Welfare - - General
- J1 - Labor and Demographic Economics - - Demographic Economics
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