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What Linear Estimators Miss: Re-Examining the Effects of Family Income on Child Outcomes
by Katrine Vellesen Loken, Magne Mogstad, Matthew Wiswall
(May 2010)
published in: American Economic Journal: Applied Economics 2012, 4(2), 1–35

Abstract:
This paper uses a rich Norwegian dataset to re-examine the causal relationship between family income and child outcomes. Motivated by theoretical predictions and OLS results that suggest a nonlinear relationship, we depart from previous studies in allowing the marginal effects on children’s outcomes of an increase in family income to vary across the income distribution. Our nonlinear IV and fixed-effect estimates show an increasing, concave relationship between family income and children's educational attainment and IQ. The linear estimates, however, suggest small, if any, effect of family income, because they assign little weight to the large marginal effects at the lower part of the income distribution.
Text: See Discussion Paper No. 4971  




 

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