How is the income component of the GDI calculated?

The income component, female and male estimated earned income, is calculated based on GNI per capita in PPP$ (2011 constant prices), female and male shares of the population, female and male shares of economically active population, and ratio of female to male wages in all sectors.

The income component of the GDI is a proxy to command over economic resources. This component captures income gaps in a way similar to the focus on gender gaps in other HDI components.