But flipped the other way around, the more impressive American absolute change is only an artifact of its larger inequality. Danes are not moving around between

But flipped the other way around, the more impressive American absolute change is only an artifact of its larger inequality. Danes are not moving around between $15k and $40k incomes, because nobody makes a $15k income (minimum wage is $38k/yr). So that whole bit of the "American dream" mobility has just been cut off, with no loss to society... Relative position also matters quite a bit. In Denmark, you can be born on the lower end of society, and end up as one of the country's elites, with greater probability than is the case in the US. I take this as the "Horatio Alger" myth: you are born to a dock worker, and end up President of the USA, or CEO of a Big Company, a unique trajectory only possible in America. But you are actually more likely to make this dockworker-to-PM or dockworker-to-CEO transition in Denmark, contrary to the myth! Put differently, who constitutes the elite in Denmark is less determined by parentage, whereas the American political/economic/cultural elite is more heredity-determined, because the differences from birth are too large to overcome. I think this question of which stratum of the previous generation's families this generation's CEOs/etc. come from has significant implications for society: if it's only from last generation's top-20%, this produces a multi-generational elite, which is generally bad. It could well be that one way to combat the emergence of a multi-generational elite is simply to reduce income inequality.