There are studies conducted such as the “World Happiness Report” and “Happy Planet Index” which both measure happiness across the world based on the Gallup World Poll, which is the most comprehensive and farthest-reaching survey of the world, tracking human development worldwide. The World Happiness Report gathers its research based on six main factors, including levels of GDP, life expectancy, generosity, social support, freedom, and corruption. The Happy Planet Index gathers its research based on wellbeing, life expectancy, inequality of outcomes, and ecological footprint. Observing the data from all categories, the Nordic countries typically rank in the top ten out of all countries in the world, according to the 2020 World Happiness Report.