Answer :
A measure of the economic impact of the young and old on the more economically active and productive members of a population is known as the dependency ratio.
What is dependency ratio?
The age dependency ratio measures the proportion of dependents—those aged 15 to 64—to the working-age population. Data are presented as the number of dependents per 100 people who are working age.
The population ages 0 to 15 is divided by the population ages 16 to 64 to calculate the youth dependency ratio. The population aged 65 and above divided by the population aged 16 to 64 is known as the old-age dependency ratio. The ratios for youth and old age together make up the total age dependency ratio.
Thus a measure in economic study of working age group is known as dependency ratio.
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