1. Data Collection and Analysis 1.1 Global Study Questionnaire Overall, 118 questionnaire replies from 92 countries have been submitted, including 41 responses from Europe, 27 from Africa, 20 from Asia, 19 from North and South America and 11 from Oceania.1 As many as 67 responses have been officially submitted by States (Governments). Information reported in the responses to the questionnaire has been verified and, if necessary, requests for explanation and/or correction have been sent to the selected stakeholders. In 50 States data collection efforts have been coordinated by the national focal points established specifically for the purpose of the Global Study. As replies could have been submitted in any of the six official languages of the UN, they have been carefully translated into English to facilitate analysis by all research groups. The questionnaire contained two general categories of questions: 1) concerning legislation, public policies and conditions in places of detention and; 2) focusing on numerical data (statistics) on children deprived of liberty on an annual basis (in the period 2008-2017) and on a specific, snapshot date (26 June 2018). The most complete data were collected for the administration of justice – on average stakeholders answered 72% of the questions asked. Other well-reported areas were children living in places of detention with their primary caregiver (59% of questions answered) and institutions (47% of questions answered). For the most underreported area (armed conflict) stakeholders on average answered only 14% of the questions. This was, however, predictable as most of the questions were relevant for countries either experiencing or emerging from the armed conflict. For this reason, the references to the questionnaire are distributed unequally within the Global Study and are particularly numerous in the well-reported areas. 1 Non-Self-Governing Territories have been treated as separate entities if the relevant data were available. 35