From Empirical Economics:
Athanasios Lapatinas, Anastasia Litina
First Online: 26 June 2018
Backed by strong empirical results, obtained from several different specification and sensitivity analyses, this paper contends that countries with high-intellectual quotient populations produce and export more sophisticated/complex products. This result is further reinforced by the quality of democracy. …
Figure 2 shows that Intelligence is positively associated with Sophistication with a correlation coefficient between ECI and IQ at 0.77. Countries with high IQ populations and high product sophistication include Japan, Singapore and Switzerland.
And here’s my 2002 review of the first work in this now extensive literature, Lynn and Vanhanen’s IQ and the Wealth of Nations.