PRESTON CURVE

Why In News:

§  It was first proposed by American sociologist Samuel H. Preston in 1975.


What is Preston Curve?

§  It highlights that an increase in per capita income of a country does not cause much of a rise in the life expectancy of its population beyond a point.

§  When a poor country begins to grow, its per capita income rises and causes increase in life expectancy initially due to nutrition, sanitation and access better healthcare.

§  However, it begins to flatten out after a certain point.

 

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