Block Group

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Block Group

A location used by the U.S. Census Bureau where approximately 800 to 1,000 people live. As the name indicates, a block group is usually a collection of city blocks. It is a subdivision of a census tract and is the smallest geographical unit for which the Census reports data.
References in periodicals archive ?
An analysis of census data from 1990 shows that before the demolition census block groups (the smallest geographic areas for which poverty rates are calculated) containing high-rise public-housing developments had extremely high poverty rates.
The loss of 430 mammography machines (5,137 in 2002 to 4,707 machines in 2008), coupled with an increase in the population of women aged 40+ in block groups with access to one or more facilities (11 percent increase from 2002 to 2008), shifted 70 percent of block groups with excess capacity in 2002 to adequate capacity in 2008.
Because block groups are fairly small geographically, spatial autocorrelation is also, to some degree, dealt with through the inclusion of these variables.
Since Boulder County contains 200 block groups, each land-cover class can occur in up to 200 target zones, and this also represents the maximum number of modeling units that can be used to fit a land-cover-specific statistical model to estimate the number of particular residential building types.
Census Bureau 2004) with a 2000 population of [greater than or equal to] 100,000, and further within census block groups with a population density of [greater than or equal to] 2,000 persons/[km.
Block groups are contained within census tracts and generally contain between 600 and 3,000 people, with an optimum size of 1,500 people.
In the 1980s, cases were more likely in census block groups with poor housing conditions, but by the 2000s, cases were associated with affluent areas concentrated in the Santa Fe--Albuquerque region.
MUCH has been written recently in Your Say comparing the advantages and disadvantages of being represented by an independent councillor in comparison with a councillor from one of the main parties who vote in block groups at council meetings.
Much of the current neighborhood-based research uses variables aggregated on administrative boundaries such as zip codes, census tracts, and block groups.
They found that off-premise outlets appeared to be responsible for about one in four simple assaults and one in three aggravated assaults in 302 geographic block groups that encompassed all of Cincinnati.
In the first stage of selection, 710 census block groups were categorized by gonorrhea prevalence and number of households with at least one resident aged 15-24.
Alternately, in September, a federal judge in Orlando, Florida, ruled that it was illegal for the city of Orlando to block groups from feeding the hungry and homeless in a local park because it "violates activists' basic civil rights," according to the Orlando Sentinel.