The HPI concentrates on the deprivation in the three essential elements of human life already reflected in the HDI: longevity, knowledge and a decent standard of living. The HPI is derived separately for developing countries (HPI-1) and a group of select high-income OECD countries (HPI-2) to better reflect socio-economic differences and also the widely different measures of deprivation in the two groups
The Gender Empowerment Measure (GEM) is the United Nations Development Programme's attempt to measure the extent of gender inequality across the globe's countries, based on estimates of women's relative economic income, participations in high-paying positions with economic power, and access to professional and parliamentary positions.
In 1995 in the Human Development Report commissioned by the United Nations Development Program set-out to create two new measurement indices for measuring development. Their aim was to add to the Human Development Index by way of including a gender dimension in the measure. They were created in order to rival the traditional income-focused measures of development such as the Gross Domestic Product (GDP) and the Gross National Product (GNP). Haq, the first director of the Human Development Report Office, established several principles for the newly emerging measure including provisions that it had to be simple, had to be represented as a single number, had to be easily calculated, had to yield numbers that were internationally comparable, had to use numbers available on a yearly basis and had to use numbers that