Furthermore, composite indices are mostly based on household level data. This, however, is problematic when analysing the well-being of children or other specific groups, as the needs of people differ depending on their age and as the intra-household resource distribution is not always equal. As agreed by the states represented at the UN World Summit for Social Development in Copenhagen, "Absolute poverty is a condition characterised by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information; it depends not only on income but also on access to social services" (United Nations, 1995, Chapter II, 19).