Preston curve
Preston Curve
The Preston Curve (/ˈprɛstən kɜːrv/) is a empirical cross-national analysis which illustrates the correlation between life expectancy and income per capita. The curve was named after the economist Samuel H. Preston, who first developed the concept in 1975.
Etymology
The term "Preston Curve" is derived from the name of the economist Samuel H. Preston, who first published a paper on the relationship between income and life expectancy in 1975. The word "curve" refers to the graphical representation of this relationship.
Description
The Preston Curve demonstrates a positive correlation between a country's income per capita and the life expectancy of its citizens. This means that as income per capita increases, so does life expectancy. However, the curve also shows that the increase in life expectancy tends to slow down as income per capita continues to rise, indicating a diminishing return on income in terms of life expectancy.
Related Terms
- Income per capita: The average income earned per person in a certain area in a specified year.
- Life expectancy: The average number of years a person is expected to live, based on current age and other demographic factors.
- Empirical: Based on, concerned with, or verifiable by observation or experience rather than theory or pure logic.
- Samuel H. Preston: An American economist and demographer who is known for his work on the Preston Curve.
See Also
External links
- Medical encyclopedia article on Preston curve
- Wikipedia's article - Preston curve
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