I suspect that this simply means that GDP approximately follows a log-normal distribution.
This doesn’t quite follow, since both per capita GDP and mean national IQ aren’t drawn from the same sort of distribution as individual production and individual IQ are, but I agree with the broader comment that it is natural to think of the economic component of intelligence measured in dollars per year as lognormally distributed.
This doesn’t quite follow, since both per capita GDP and mean national IQ aren’t drawn from the same sort of distribution as individual production and individual IQ are, but I agree with the broader comment that it is natural to think of the economic component of intelligence measured in dollars per year as lognormally distributed.