According to that particular study.
Now, I should really stress that there are all sorts of difficulties in doing this. Deriving those purchasing power parity numbers is extremely difficult, so I would take this as a rough-and-ready guide.
The main point is that the relative low-income measures, such as half the median income, demonstrate a very high low-income rate in the United States relative to European countries. When you look at some form of purchasing power parity numbers, that disappears. That's the main point.