that's what I figured, the people metric seems more pertinent to ideas of economic mobility across the population as a whole, we could think of a population per

that's what I figured, the people metric seems more pertinent to ideas of economic mobility across the population as a whole, we could think of a population percentile, like say jumping into the notorious 1%. But the other metric is interesting too, something like an age x wealth product, the longer the wealth was held the higher the score, and the more wealth held the higher the score too. One could imagine like an area under net worth curve and create a histogram with decades of time as buckets, say across a 300 year span maybe?