CHAPTER 3 DATA COLLECTION AND ANALYSIS institutions. Due to the limited data submitted under the Global Study questionnaire, the number of children detained in the context of armed conflict and on the grounds of national security was estimated based on the latest reports from international organisations and a thorough literature review.5 Process of Data Analysis UNIQUE DATASET FOR EACH THEMATIC AREA Five common variables (region, total population, children population, GDP per capita, Gini index) Between 7 and 10 area-specific variables (e.g. Rule of Law Indicator; female prison population; international migrant stock, Human Development Index) CONSTRUCTION OF REGRESSION-BASED MODELS Estimates based on the explanatory variables (common variables + area-specific variables) Various statistical methods models tested (e.g. multiple regression models, random forest regression, multiple imputation by chained equations) ESTIMATES - NUMBER OF CHILDREN DEPRIVED OF LIBERTY IN SPECIFIC SITUATION Number of children deprived of liberty annually Number of children deprived of liberty on any given day (snaphshot date: 26 June 2018) 5 The number for children detained in the context of armed conflict is based on the figures reported under the UN Monitoring and Reporting Mechanism on grave violations committed against children in situations of armed conflict as well as estimates from UNICEF. For more on armed conflict see: Chapter 13 on Children Deprived of Liberty in the Context of Armed Conflict (4.1. Data: The Number of Children Deprived of Liberty). For more on national security see: Chapter 14 on Children Deprived of Liberty on National Security Grounds (4.1. Data: The Number of Children detained for National Security). 40