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).