Simpson's Paradox says you can have rich people country A outperform rich people in country B and poor people in country A outperform poor people in country B a

Simpson's Paradox says you can have rich people country A outperform rich people in country B and poor people in country A outperform poor people in country B and have country B outperform country A when both groups are put together. This is probably not the case, but since this is hacker news I'm being a dork about the math.