For each one-point increase in a country’s average IQ, the per capita GDP was $229 higher, and can go up to $468 higher for each additional point

A 2011 study in Psychological Science revealed that in a study of 90 countries, the "intelligence of the people, particularly the smartest 5 percent, made a big contribution to the strength of their economies." Intelligence was determined by various factors such as test scores in science and technology and Nobel Peace prize awards.

In the 2015 book "Hive Mind," economics professor Garett Jones argues that a nation's IQ is a fundamental indicator of its economic success.

Source: Psychological Science