>True. I wonder if it might be a better sample of "the rich" to run
>the same analysis on the Forbes 400 across time.
>
>At the very least, it would be nice to have both, and the Forbes
>data is easily accessible.
Forbes does it all the time, and finds considerable turnover (though I can't remember the numbers, and don't have time to look them up). They like that, because it shows America is the endlessly self-renewing land of opp't'y, as they say in the want ads.
Doug