The income elasticity of health care spending in developing and developed countries.

To date, international analyses on the strength of the relationship between country-level per capita income and per capita health expenditures have predominantly used developed countries' data. This study expands this work using a panel data set for 173 countries for the 1995-2006 period. We found that health care has an income elasticity that qualifies it as a necessity good, which is consistent with results of the most recent studies. Furthermore, we found that health care spending is least responsive to changes in income in low-income countries and most responsive to in middle-income countries with high-income countries falling in the middle. Finally, we found that 'Voice and Accountability' as an indicator of good governance seems to play a role in mobilizing more funds for health.