IQ and the weight of nations

The antecedents of the 'weights of nations' have been in the center of theoretical and empirical discussion over the past decades. In this research, we contribute to extant studies by investigating the effect of general intelligence, measured by nation IQ, on the Body Mass Indices (BMI) of male and female populations for 187 countries of the world. Our results suggest an inverted U-shaped link between intelligence and BMI. The results remain robust to a number of robustness checks such as controlling for urbanization, globalization and trade.