Model
Digital Document
Publisher
Florida Atlantic University
Description
Frontier areas and rural areas historically have
been predominantly male (high sex ratio); urban areas
were predominantly female (low sex ratio). In 1970 the
Middle West scored average on the sex ratio scale for
all age cohorts; the West was high, the South low. Highest
sex ratio was in port and military locales; lowest was
in urban areas of the Northeast and South. Two regression
models reveal that percentage urban, net migration,
and percentage Black were most important explanators of
sex ratio. The greater life expectancy of females and
their tendency to concentrate in the cities, the larger
net migration rate of males, and the lower sex ratio
of Blacks, were causal. Analysis by age cohort revealed
regional differences exist only after age 34. After
adjusting for the above independent variables, the West
still scored highest and the South lowest.
been predominantly male (high sex ratio); urban areas
were predominantly female (low sex ratio). In 1970 the
Middle West scored average on the sex ratio scale for
all age cohorts; the West was high, the South low. Highest
sex ratio was in port and military locales; lowest was
in urban areas of the Northeast and South. Two regression
models reveal that percentage urban, net migration,
and percentage Black were most important explanators of
sex ratio. The greater life expectancy of females and
their tendency to concentrate in the cities, the larger
net migration rate of males, and the lower sex ratio
of Blacks, were causal. Analysis by age cohort revealed
regional differences exist only after age 34. After
adjusting for the above independent variables, the West
still scored highest and the South lowest.
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