MACHINE-READABLE DATA FILES AS PRIMARY SOURCES
Machine-readable data files may have been transferred from their original format
to a machine-readable form or may exist only as electronic resources. The data
exist in a format that requires documentation (often called a codebook) to decipher.
The data are used in a statistical software program in order to perform statistical
analysis. It is often necessary to have some knowledge of statistical methods
and statistical computer packages before using these data files.
identifying machine-readable data files.
Examples of sources which have been converted to data files are:
- Historical population, economic and social data: France, 1801-1896 =
Donnees historiques sur la population, l'economie et le context social: France,
1801-1896 [computer file] . Ann Arbor, Mich.: Inter-University Consortium
for Political and Social Research, [197 - ]. Social Science Library
Data Doc HA1230 H58 (LC)
This collection of data files was converted from published reports of three
national statistical series : Statistique générale de la France,
which contains results of the quinquennial census of population, 1851-1896
; Statistique de la l'enseignement primarie for data on primary education;
and Mouvement de la population for vital and demographical statistics.
- David Herlihy and Christiane Klapisch-Zuber. Census and property survey
of Florentine domains and the city of Verona in the fifteenth century ltaly
[computer file] . Cambridge, Mass.: David Herlihy, Harvard University,
Department of History and Paris, France: Christiane Klapisch-Zuber, Ecole
Pratique des Hautes Etudes [producers], 1977. Madison, Wis.: University of
Wisconsin, Data and Program Library Service [distributor], 1988. http://dpls.dacc.wisc.edu/Catasto/
This collection is coded from the official manuscripts of the tax declarations
(campioni) in fifteenth century Italy.
- Integrated Public Use Microdata Series, 1850 - 1990 [computer file].
Minneapolis, Minn.: Minnesota Historical Census Projects, Dept. of History,
University of Minnesota, [199 - ].
The Integrated Public Use Microdata Series (IPUMS) is the largest publicly
accessible computerized database on a human population. The series includes
individual-level samples of the United States population censuses from 1850
to 1990. Most of these samples have existed for several years, but researchers
have found it hard to make comparisons between them because they are generally
coded and documented differently. The IPUMS combines them into a single database
that, insofar as possible, assigns uniform codes to variables across all years
for which they are available. The IPUMS includes all information available
in the original public use samples for each census year.
- Data which exist only in machine-readable versions include public opinion
or other survey data and need to be distinguished from reports of the surveys.
Examples of these include:
- Euro-Barometer [computer file] . Ann Arbor, Mich. : Inter-University
Consortium for Political and Social Research. Social Science Library
Data Doc HM261 C652 (LC)
This series of surveys has been conducted to assess attitudes of individuals
in the European Community toward European unification. Also included are questions
on social issues, political behavior and demographic characteristics.
- Euro-barometer . Brussels : Commission of the European Communities,
1974 -. Government Documents Center EC 1.1022
This reference is to the printed reports of these surveys. The printed reports
contain tabulated data and individual responses cannot be identified.
- Current population survey, [computer file] / principal investigator,
United States Department of Commerce, Bureau of the Census. Ann Arbor, Mich.
: Inter-university Consortium for Political and Social Research [distributor],
197- . Social Science Library Data Doc HA201 C875 (LC)
This group of surveys is conducted regularly to provide the government with
the information necessary to make population projections, analyze poverty and
unemployment, and study demographic trends. The data from the survey are stored
in records for households and individuals but are only published in tabulated
form in various government publications. This is the bibliographic record for
the computer tapes distributed by the Inter-university Consortium for Political
and Social Research.
- Current population survey : annual demographic files. [computer file]
. Washington, D.C. : U.S. Dept. of Commerce, Bureau of the Census.
Government Documents Center, C 3.224/12
This is the record for the CD-ROM version of the survey, which is distributed
by the Bureau of the Census.
This material is based on the Web site created to support a series of colloquia
in historical research offered by the Yale University Library. The initial site
was prepared in August 1996 by Suzanne Lorimer, Susanne Roberts, Margaret Powell,
George Miles, Fred Musto, Emily Horning, Cesar Rodriguez, Nancy Godleski, Richard
Williams, Elizabeth Pauk, and Martha Brogan.
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