For children under 16, it is based on two household-level indicators: a computer and an internet connection (accessed by any means, including via a phone or a television). Availability of a TV in the household was considered as an alternative indicator, but was excluded because public information can be obtained via the internet. For 17-18-year-olds, whether they have a mobile phone is used as the third indicator of the information dimension because of the high prevalence of mobile phone use among young people in the EU.15 In a Special Eurobarometer survey on the perceptions of poverty and social exclusion carried out in 2007, young people aged 15-24 were the most likely of all cohorts to name having a mobile phone an absolute necessity (TNS Opinion & Social 2007). It comprises three indicators: overcrowding, water and sanitation, and multiple housing problems. All three are measured on the household level, so this dimension is constructed identically for all age groups. Overcrowding is measured using the Eurostat definition.