Gender-related Development Index

The Gender-related Development Index (GDI) is an indication of the standard of living in a country, developed by the United Nations (UN). It is one of the five indicators used by the United Nations Development Programme in its annual Human Development Report. It aims to show the inequalities between men and women in the following areas: long and healthy life, knowledge, and a decent standard of living.

Methodology
Calculating the GDI involves three steps. Step 1: Unit-free indices between 0 and 1 are calculated for females and males in each of the following areas: 1)life expectancy, 2) education (the adult literacy rate and the combined primary to tertiary gross enrollment ratio), 3) estimated earned income (at PPP US$). \frac{2} {3}\frac{\mbox{adult literacy rate of gender}} {100}+ \frac{1} {3}\frac{\mbox{gross enrollment rate of gender}} {100}$$
 * Female Life Expectancy Index = $$\frac{\mbox{female life expectancy} - 27.5} {87.5-27.5}$$
 * Male Life Expectancy Index = $$\frac{\mbox{male life expectancy} - 22.5} {82.5-22.5}$$
 * Female & Male Education Indices = $$
 * Female & Male Income Indices = $$\frac{log(\mbox{earned income of gender}) - log(100)} {log(40,000)-log(100)}$$

Step 2: For each area, the pair of gender indices, are combined into an Equally Distributed Index that rewards gender equality and penalizes inequality. It is calculated as the harmonic mean of the two indices.
 * Equally Distributed index = $$\left(\frac{\mbox{female share of population}}{\mbox{female-index}}+\frac{\mbox{male share of population}}{\mbox{male-index}}\right)^{-1}$$

Step 3: The GDI is the unweighted average of the three Equally Distributed Indices: Equally distributed life expectancy index, Equally distributed education index, Equally distributed income index

2006 report
Results of the GDI for 136 countries can be found in the UNDP's GDI report