The "real median household income" is a per-household number (divided by number of households), while the "EU household real income per capita" is a per-capita

The "real median household income" is a per-household number (divided by number of households), while the "EU household real income per capita" is a per-capita number (divided by number of people). Household sizes are different and shrinking at different rates. Also, I think the EU figure is an average, not a median. As I noted above, the Fed figure may not include imputed income from social benefits. So if social benefits are increasing as a share of European incomes, the comparison above may understate the EU's growth relative to the US.