i grew with you n imigration idon'think it's important. For a while, all the studies looked that followed the same people over time showed large gams for the poorest people. That's true in the study of income dynamics that people have analyzed since the 19 seventies. But i fiftyporsenicomnea. I just gave that as an example of howa misleading it could be when you look at different snapshots over time because they're not the same people. A, but t you tha that may be trwein some studies at to seveata and pesaly, but that's not true in the studies that choose the pocration wide social security data