I don't think I claim that's the only metric that matters. If I did, that was a mistake. Money is a big influencing factor in-terms of saying what kinds of resources a child has access to for their education, because it's simple to turn money into tutoring or other life experiences. But obviously, for example, having parents who themselves are well-educated and understand how to educate children is a resource that can be more valuable than just having parents with money. There are, of course, many many other examples of non-monetary resources that are accessible by some children and not other, though.