The report of a Global Cantril Ladder Survey conducted by the polling company Gallup, Inc. are used to calculate the World Happiness Index rankings. People are asked to rate their own current lifestyles on a scale of 0 to 10. The results of the life evaluation are linked with a variety of facets of living in the Happiness Index report. In the World Happiness Index reports, specialists from a range of fields including economics, psychology, survey analysis, and country statistics, discuss different topics.