Can Income Inequality Reduce the Happiness of a Healthy Population?

The relationship between health and happiness is well established. However, disability and the burden of disease can also affect the happiness of the local population. We argue that income inequality can worsen the positive effect of health on happiness levels. Using data from 136 economies from 2005 to 2019, we estimate a dynamic panel model that controls the endogeneity and simultaneity issues, and measure the effect of healthy life expectancy on happiness at varying levels of income inequality. We find evidence that healthy life expectancy is significantly and positively associated with happiness, however, at high levels of income inequality, this effect reduces. We shed new perspectives on the costs of income inequality.