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Multiple regression analysis techniques are used to measure the impact of variations in fertility and mortality rates on the population of labor-force age. The results of this analysis suggest that the impact of reductions in mortality on age composition are dependent on the level of mortality already attained, whereas reductions in fertility, as expected, increase the population in the nondependent age groups. The direct effect of vital rates on potential per capita income is assessed using the results of the regression equations, and such results suggest that variations in per capita income as large as 20 percent could be accounted for by variations in vital rates.

The effects of demographic factors on age composition and the implications for per capita income