How does family income relate to SAT scores across racial groups?
Core argument: An analysis of 781,437 college-bound Black and White students who took the SAT in 2003 found the effect of family income on scores is substantial, non-linear, and nearly twice as large for Black students as for White students.
An analysis of 781,437 college-bound Black and White high school students who took the SAT in 2003 reveals significant disparities in SAT performance linked to race and family income. The study found that the impact of family income on SAT scores is substantial, non-linear, and nearly twice as large for Black students compared to their White counterparts. For instance, a White student from a family earning ~$20K scored comparably to a Black student from a family earning ~$100K. These findings underscore the complex interplay between socioeconomic factors and educational outcomes, highlighting the need for targeted policy interventions to address these inequities.









Ed Comment:“The bottom line is that the relationship between concentration, competition, and productivity growth is subtle: rising concentration does not necessarily imply declining competition, and more competition does not necessarily stimulate growth.” my view is that this over emphises the roll of national entry into local markets….”
FRBSF note from Aghion's (that Theory of Falling Growth and Rising Rents paper) co-author Klenow looks at the life cycle of concentration/competition, most productive firms expand to new markets, improving productivity but eventually markups get competed away which drags down innovation
"....first, IT expansion increased competition, and second, increased competition eventually deterred innovation....The reason for the changing relationship between innovation and competition is that they are both driven by changes in the cost of adding new products, which have two opposing effects on the incentives for firms to innovate. On one hand, lower cost directly reduces the cost of adding a new product and encourages firms to innovate. On the other hand, as firms expand, they become more likely to compete against each other through lower prices, which reduces their profit margins. Lower profits discourage innovation. The net impact on innovation depends on which effect dominates. When the initial level of competition is low and there are many untapped markets, the effect supporting innovation dominates. When the initial level of competition is high and there are few untapped markets, however, there is less support for innovation...."