I'm in the same boat. I don't see "position in hierarchy" as a "trait". The second biggest indicator seemed to be getting income from property (land, investme

I'm in the same boat. I don't see "position in hierarchy" as a "trait". The second biggest indicator seemed to be getting income from property (land, investments, etc.) vs. labor. Looking up the dictionary definition of trait seems to define it as one's distinguishing qualities, especially those of personal character. The author seems to have expanded this, and ends up with what is essentially a tautology. Being in a high-income role is the greatest predictor of income. However, if we're going with the author's definition, then I'm saying the trait most associated with income is "unicorn startup founder".