Most-stressed countries — methodology
The first thing to note is that the ranking includes 74 countries only. Comprehensive data could not be found for every country in the world and the ranking is therefore restricted to only those countries that can be fairly compared.
Bloomberg’s study uses seven equally weighted variables: homicide rates, GDP per capita (adjusted for purchasing-power parity), income inequality, corruption perception, unemployment, urban air pollution and life expectancy.
Countries were allotted points for each variable based on their relative position in that category’s ranking. The country with the least-stressful measure for each variable received 0 points, while the country with the highest stress level received 100 points. All other countries were scored on a percentile basis depending on their position between the two extremes. Points for the seven variables were averaged for a final score from 0 to 100, a higher score indicating a more stressful living environment.