> Stated differently, being the descendants of the Bernardi family (at the 90th percentile of earnings distribution in 1427) instead of the Grasso family (10th percentile of the same distribution) would entail a 5% increase in earnings among current taxpayers (after adjusting for age and gender).
A 5% difference in earnings between descendants of a 90th percentile family and a 10th percentile family may be statistically significant, but it’s still only 5%. A 5% difference in earnings isn’t going to move someone from lower class to upper-middle class lifestyle.
The authors found that some of this effect was due to certain families that tended toward elite professions like doctors and lawyers. I suppose we could make an argument for eliminating legacy preference in university admissions, but I’m sure some families would still bias toward certain professions in the interest of following in their parents’ footsteps.