The Gender Inequality Index (GII) is a composite measure of gender inequality in three dimensions: reproductive health, empowerment, and the labor market. It is calculated using data from the United Nations Development Programme (UNDP) and other sources.

The three dimensions of the GII are reproductive health, empowerment, and the labor market. Reproductive health includes indicators such as maternal mortality, adolescent birth rate, and unmet need for family planning. Empowerment includes indicators such as women's participation in parliament, women's share of earned income, and women's access to education. The labor market includes indicators such as the female labor force participation rate, the gender wage gap, and the occupational segregation of women.

The GII is calculated by taking the weighted average of the three dimensions. The weights are determined by the importance of each dimension to overall gender inequality. The reproductive health dimension is given a weight of 1/3, the empowerment dimension is given a weight of 1/3, and the labor market dimension is given a weight of 1/3.

The GII ranges from 0 to 1, with 0 representing perfect gender equality and 1 representing complete gender inequality.

Norway has the highest GII, followed by Iceland, Finland, and Sweden.

Yemen has the lowest GII, followed by Chad, Niger, and the Central African Republic.

The average GII for the world is 0.46.

The GII has been decreasing over time, indicating that gender inequality is declining worldwide.

Gender inequality is caused by a combination of factors, including discrimination against women, lack of access to education and healthcare for women, and cultural norms that perpetuate gender inequality.

Gender inequality has a number of negative consequences for women, including poverty and economic insecurity, violence against women, and limited opportunities for women in education and employment.

Reducing gender inequality requires a comprehensive approach that includes empowering women through education and economic opportunities, changing cultural norms that perpetuate gender inequality, and enacting laws and policies that promote gender equality.

The goal of the SDGs with respect to gender inequality is to achieve gender equality and empower all women and girls, eliminate all forms of discrimination against women and girls, and ensure that women and girls have equal access to education, healthcare, and employment.

Men and boys play an important role in achieving gender equality by challenging gender stereotypes and norms, supporting women and girls in their efforts to achieve equality, and speaking out against discrimination and violence against women and girls.

Individuals can promote gender equality by educating themselves about gender inequality, challenging gender stereotypes and norms, and supporting women and girls in their efforts to achieve equality.

Gender equality is a human right, essential for economic development and social progress.