- Population mobility
Population mobility, geographic mobility or more simply mobility is a statistic that measures migration within a population. It is most commonly used in
demographyand human geography, it may also be used to describe the movement of animals between populations.
Mobility estimates in the Current Population Survey (CPS), produced by the
United States Census Bureau, define mobility status on the basis of a comparison between the place of residence of each individual to the time of the March survey and the place of residence 1 year earlier. Non-movers are all people who were living in the same house at the end of the migration period and the beginning of the migration period. Movers are all people who were living in a different house at the end of the period rather than at the beginning. Movers are further classified as to whether they were living in the same or different county, state, region, or were movers from abroad. Movers are also categorized by whether they moved within or between central cities, suburbs, and non-metropolitan areas of the United States.ref|CPS
The CPS also includes information on reasons for a move. These include work-related factors, such as a job transfer, job loss or looking for work, and wanting to be closer to work. Housing factors include wanting to own a home, rather than rent, seeking a better home or better neighborhood, or wanting cheaper housing. Additional mobility factors include attending college, changes in marital status, retirement, or health-related moves.
Population turnover is a related statistic that measures the movement measures gross moves in relation to the size of the population, for example movement of residents into and out of a geographic location between
Population mobility has implications ranging from changes in Congressional representation, impact on local economic growth, housing markets, and demand for local services. Mobility may also affect the spread of infectious diseases.
*United States Census Bureau. [http://www.census.gov/population/www/cps/cpsdef.html Current Population Survey (CPS) - Definitions and Explanations]
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