> unfair to compare the 20-40 range vs the 60-80 range. No, you want the skew. The goal is to capture the people who own 90% of stock, so you do want wealth r

> unfair to compare the 20-40 range vs the 60-80 range. No, you want the skew. The goal is to capture the people who own 90% of stock, so you do want wealth regardless of age. It would be more accurate to have some measure of stock ownership to income, but I think that would not be as useful. Stock ownership probably does just track closely with age, since you store up all these assets to live off during retirement. Most young people will not own 1M+ in retirement and investment funds. Even high income people will instead spend that money on a house etc.