The changing sex ratio in the United States.

Abstract

The number of males per 100 females has been declining in the United States since 1910. By 1945 the ratio was slightly below 100 according to current estimates of population, but, because of underreporting of young males in the 1940 census, it was probably actually somewhat higher than the estimates indicate. The factors which depress the sex ratio may be expected to continue to operate in the near future, but the decline will be very gradual. There are reasons for expecting an eventual rise. Popular alarm over a sex ratio slightly below 100 is not justified.