The IR dataset is compiled from UN Human Development statistics. The UN Human Development data has been collected annually by the UNDP since 1990. It collects a wide variety of data to measure development and quality of life beyond economic indicators. It combines several variables to create a Human Development Index each year, which ranks how countries are doing overall, including variables like literacy, health, poverty, and employment. Data is also collected on gender and economic inequality, refugees and immigration, prison populations, and some public opinion questions. UN data is used by many researchers each year in addition to the UN’s own annual development reports.