Dados e método: Data Sources & Demographic Methodology
TerraRoll synthesizes open international statistical releases into an accessible probability model covering 172 countries and territories and more than 99.4% of global annual births, published openly for students, researchers, and curious players.
Annual Births, Population & Sex-Specific Life Expectancy: United Nations World Population Prospects (UN WPP) demographic indicators, female-to-male longevity differentials, and under-5 child survival tables.
Household Purchasing Power & Inequality: World Bank World Development Indicators (WDI) GDP per capita (PPP, constant international dollars) paired with Gini index income dispersion distributions.
Schooling, Wellbeing & Digital Access: UNESCO UIS and UNDP Human Development Report expected years of schooling, ITU individual internet penetration, urbanization share, and World Happiness Report life evaluations.
Bilateral Migration Corridors: UN DESA International Migrant Stock origin-to-destination matrices across major regional pathways.
Normalization, Fallbacks & Educational Scope
Where a statistical agency omits a recent year for a territory, TerraRoll uses the nearest published release or regional peer median rather than leaving broken gaps, and exposes the complete machine-readable dataset at /country-data.json.
Simulated lives are fictional stories inspired by aggregate national distributions, never predictions about any real person. Within-country regional diversity, community mutual aid, and individual choices always reach far beyond macro averages.