This is from an 2019 article in The Atlantic by Daniel Markovits:

Harvard, Princeton, Stanford, and Yale collectively enroll more students from households in the top 1 percent of the income distribution than from households in the bottom 60 percent. Legacy preferences, nepotism, and outright fraud continue to give rich applicants corrupt advantages. But the dominant causes of this skew toward wealth can be traced to meritocracy. On average, children whose parents make more than $200,000 a year score about 250 points higher on the SAT than children whose parents make $40,000 to $60,000. Only about one in 200 children from the poorest third of households achieves SAT scores at Yale’s median.

https://www.theatlantic.com/magazine/archive/2019/09/meritocracys-miserable-winners/594760/