Print Friendly, PDF & Email

Preston curve

 Context: The Preston curve gives a positive empirical relationship between a country’s life expectancy and its per capita income. It was first identified by Samuel H. Preston in 1975.

It suggests that as poor countries grow and their per capita income increases, life expectancy rises significantly due to better access to healthcare, education, nutrition, and living conditions. However, this relationship flattens out at higher income levels, indicating diminishing returns on life expectancy gains with further income increases.

Preston curve
Preston curve

 Source: TH