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Biomedical subjects

R L Morrill

Publications and source records attributed to R L Morrill.

7 recordsLinked to original sources
PubMed1995

Aging in place, age specific migration and natural decrease.

"This analysis of regional demographic change evaluates the roles of 'aging in place' and of age-specific migration on the geographic pattern of the advent of natural decrease in the United States. The spread of natural decrease is projected on the basis of recent births and deaths, in the absence of migration. Age-specific migration data for Oregon and Washington are used to develop a typology of counties that can be used in turn to modify the probable timing of natural decrease."

Age Distribution↗
PubMed1988

Intra metropolitan demographic structure: a Seattle example.

"Internal urban variation in demographic character (births, deaths, fertility, natural increase, net migration) is analyzed in relation to age of persons, age of housing, ownership, distance from the CBD [central business district], race, household type and size. A descriptive analysis of maps of these characteristics is followed by simple statistical tests of relations among the variables, in particular distance from the city center. Predictable and strong patterns of spatial structure are consonant with expectations from economic, social, geographic and political urban theory." Data concern King County, Washington, for the period 1980-1985, (the city of Seattle) and are from local sources, including the Puget Sound Council of Governments.

Age Factors↗
PubMed1988

Migration regions and population redistribution.

"Gross and net migration flows among...[U.S.] states for 1975-80 were used to define migration regions, or groups of states with similar patterns of net interchange. This typology may be characterized as a transition from a northeastern 'core' which lost to all other regions to a northwestern 'periphery' which gained from all other regions. Florida and California were found to have an important role in redistributing population. The typology was also valid for all age groups and across racial and ethnic categories. The typology remained meaningful when the 1975-80 data were compared to 1965-70 and 1980-85 data, despite great volatility in net migration and significant change in the placement of many states." Data are taken primarily from the 1980 census.

Age Factors↗