Summary: | The American Housing Surveys (AHS), prior to 1984 called
the Annual Housing Surveys, were first conducted in 1973 by the United States
Bureau of the Census. This series comprises two types of data collections: a
national survey of housing units, and surveys of housing units in selected
metropolitan areas. The interviews cover core questions that are repeated each
year, and an additional set of questions on recurring or one-time supplemental
topics. The national data were collected annually through 1981 and have been
collected every two years since that time. The metropolitan-area data are
collected on a continuous basis and are reported annually. Through 1996, the
national data were released by the Census Bureau in two forms: the National
Core File and the National Core and Supplement (called the "National" Files
by ICPSR). Beginning with the 1997 data, these were combined by the Census
Bureau into one collection, called the National Microdata. The metropolitan-area
data were originally released as SMSA Files, MSA Files, MSA Core Files, MSA Core
Question Files, and MSA Core and Supplement Files. In 1997, the metropolitan-area
data were combined by the Census Bureau into one collection, called the
Metropolitan Microdata. Supplemental data on transportation were released in
Travel-to-Work Files for some survey years, in addition to the data on this
topic contained in the national datasets. Other recurring supplementary topics
include mobility, second and mobile homes, disabilities, cars and major
appliances, energy conservation, housing modifications, and additional questions
on housing and neighborhood quality. An important feature of these surveys is
that generally the same housing units remain in the sample year after year, and
it is the housing unit rather than its occupants that is followed. For all
American Housing Surveys, data collected on income can be used in conjunction
with annual housing expenditures to estimate the average percentage of families'
and primary individuals' incomes spent on housing. Households that have moved in
the 12 months prior to enumeration are asked to provide comparative information
on the current and previous residences of household heads. In 1997, the AHS was
redesigned to present the data in multiple separate subject-matter files, and
computer-assisted personal interviewing software was used to conduct all
interviews, which allowed new responses to some questions. Therefore, users are
asked to use caution when comparing prior years' data with data collected after
1996. |
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