My main result was that the bottom wealth quintile for 1989 (near when their study was done) was unusually well-educated, thus demonstrating that wealth at a young age is not a reliable marker for class.
I thought I would confirm this result by looking at 35-and-up families in the Survey of Consumer Finances. It's the same calculations, just with different families. If the previous hypothesis is correct, in this group we should see a smooth increase in educational attainment with increasing wealth. Here's the chart:
As I suspected. Not quite perfect, but very close.
Now, just for fun, here are the same time series charts I did for each under-35 wealth quintile in my previous post, but for 35 and up.
No real big trends to notice here, except for a general increasing educational attainment as we go up the wealth quintiles — and an odd sustained increase in grad school in the third quintile. No idea what that's about, honestly.
Up next: determining the break points separating the wealth quintiles.