An economic paper from Helsinki University on the relationship between GDP and – ahem – “organ” size:
The size of male organ is found to have an inverse U-shaped relationship with the level of GDP in 1985. It can alone explain over 15% of the variation in GDP. The GDP maximizing size is around 13.5 centimetres, and a collapse in economic development is identified as the size of male organ exceeds 16 centimetres.
Somewhat surprisingly, male organ was a stronger determinant of economic development than country’s political regime type at the Polity IV autocracy/democracy spectrum.
You can read the paper entitled “Male Organ and Economic Growth: Does SizeMatter?” over at Helsinki.Fi