I don’t know... I did much better than my dad, but then, I didn’t live through the great depression like my dad did. Somehow I think they didn’t factor that in.
I don’t know how they factored their conclusions.
My dad was a kid in the depression and, like most, was dirt poor. He survived WWII and went to college. After a couple of introductory jobs he went to work for Boeing and in 33 years rose very close to the top.
I inherited his work ethic, but not his luck (and definitely not his judgment with women!). Two disastrous divorces ruined me for many years. I’ll have to work another forty years to catch up with him ;’}
My parents didn't have it that well.
My grandfather, a mason, raised rabbits to help feed the family.