I present a formula which allows for the calculation of the Gini coefficient when the overall population distribution is unknown, but there is some information on the Gini coefficients or moments of population sub-groups. When applied to data on the global and US income distribution, it proves...

If workers self-select into sectors based upon their relative productivity in different tasks, and comparative advantage is aligned with absolute advantage, then as a sector's employment share increases (decreases) the average efficacy of its workforce will fall (rise). This provides a potential...