Income, Health, and Well-Being around the World: Evidence from the Gallup World Poll

During 2006, the Gallup Organization conducted a World Poll that used an identical questionnaire for national samples of adults from 132 countries. I analyze the data on life satisfaction and on health satisfaction and look at their relationships with national income, age, and life-expectancy. The analysis confirms a number of earlier findings and also yields some new and different results. Average life satisfaction is strongly related to per capita national income. High-income countries have greater life-satisfaction than low-income countries. Each doubling of income is associated with almost a one-point increase in life satisfaction on a scale from 0 to 10 and, unlike most previous findings, the effect holds…