Where Are All the White People in San Francisco Public Schools?
priceonomics.com
priceonomics.com
Also this phenomena was well known even back then.
If your parents live in a rent controlled apartment, then you're probably going to a public school.
If your parents can afford to pay market rents, then they probably can also afford a private school.
I found this stat startling: "The average white San Franciscan makes three times more money than the average black resident. "