The link between happiness and overall inequality is best studied using an index that incorporates different aspects of inequality, and is measured consistently in different countries. One such index is the degree to which happiness itself varies among individuals. Its correlation with both...

Strong versions of the set point hypothesis argue that subjective well-being measures reflect each individual's own personality and that deviations from that set point will tend to be short-lived, rendering them poor measures of the quality of life. International migration provides an excellent...