Volume 57 - Number 4 - Winter 1991

T. Machine-Readable Data Files (MRDF)

References to data of demographic interest that are stored in machine-readable form. All MRDFs coded under this heading are cross-referenced to specific subject categories as appropriate. Articles concerned with the availability of MRDFs are also included.

57:40794 Shultz, Steven; Regan, John. The 1990 census, GIS technology, and rural data needs. Rural Sociologist, Vol. 11, No. 1, Winter 1991. 23-9 pp. Bozeman, Montana. In Eng.
"This paper explores the possibilities and limitations facing rural sociologists who may want to integrate rural data bases, TIGER data files and GIS technology. More specifically, GIS [Geographic Information Systems] technology is described, the details of the 1990 [U.S.] census and TIGER are highlighted, and finally, specified examples and suggestions detailing how rural sociologists can use GIS technology to improve the quality of their research are provided."
Correspondence: S. Shultz, University of Arizona, College of Agriculture, School of Renewable Natural Resources, Tucson, AZ 85721. Location: Princeton University Library (PR).

57:40795 United Nations. Department of International Economic and Social Affairs. Population Division (New York, New York). Interpolated national populations by sex and age: 1950-2000. (The 1990 revision) [MRDF]. 1991. New York, New York. In Eng.
These are IBM-PC compatible diskettes that contain "annual estimates and projections of population by sex and age for all countries (with population size of 300,000 or more around 1985), regions and major areas of the world. Data for the 1950-1985 period are interpolated United Nations population estimates; data for the 1986-2000 period are from the United Nations medium variant population projections. The data are interpolated from the quinquennial population estimates and projections published in the United Nations Population Division publication The Sex and Age Distributions of Population: The 1990 Revision....The data are contained, as ASCII (text) files, on eight standard 3 1/2" 720Kb diskettes...." Cost for either set of diskettes is U.S.$200. The data are also available for the Apple Macintosh in text format.
For an earlier version of this dataset, which is available in both IBM-PC compatible or Apple Macintosh formats, see 57:10808.
Correspondence: Director, Population Division, United Nations, New York, NY 10017.

57:40796 United Nations. Department of International Economic and Social Affairs. Population Division (New York, New York). Interpolated national populations 1950-2000. (The 1990 revision) [MRDF]. 1991. New York, New York. In Eng.
This is a diskette that provides "annual estimates and projections of population size for the 1950-2000 period for all countries, regions and major areas of the world. Data for the 1950-1985 period are interpolated United Nations population estimates; data for the 1986-2000 period are from the United Nations medium variant population projections. The data are interpolated from the quinquennial population estimates and projections published in the United Nations Population Division publication World Population Prospects 1990....The data are contained on one standard 5 1/4" 360Kb diskette, formatted for an IBM compatible computer....The file is an ASCII (text) file." The data are also available for the Apple Macintosh in text format. Cost for either diskette is U.S.$25.
Correspondence: Director, Population Division, United Nations, New York, NY 10017.

57:40797 United Nations. Department of International Economic and Social Affairs. Population Division (New York, New York). Urban and rural places 1990 [MRDF]. 1991. New York, New York. In Eng.
This dataset presents "estimated and projected populations for countries, regions and major areas, their distribution between urban and rural areas, and certain indicators of population change. Data are presented quinquennially, for years 1950-2025. The data contained on these diskettes are extracted from, and fully described in, the United Nations Population Division publication, World Urbanization Prospects 1990. Diskettes for IBM-PC and compatible computers are distributed in ASCII format and in LOTUS 1-2-3 format....The ASCII files are contained on two standard 5 1/4" 360Kb diskettes....The LOTUS files are contained on three standard 5 1/4" 360Kb diskettes...." The data are available in IBM-PC compatible and Apple Macintosh formats. For Apple and Macintosh Computers, "the data are distributed on a 3 1/2" 800Kb diskette in either text (ASCII) format or in Microsoft Excel format." Cost for any set is U.S.$100.
Correspondence: Director, Population Division, United Nations, New York, NY 10017.

57:40798 United States. Bureau of the Census (Washington, D.C.). Census of Population and Housing, 1990: Summary Tape File 1 (Puerto Rico) [MRDF]. 1991. Washington, D.C. In Eng.
This file contains census data for Puerto Rico. "Population items include age, sex, marital status, group quarters, household type, and household relationship....Selected aggregates and medians also are provided. Data are presented in 26 population tables (matrices) and 48 housing tables (matrices)....Summary Tape File 1 (Puerto Rico) is released as file 1A and file 1B. The record layout is identical for both files but the geographic coverage differs....STF 1A provides data for Puerto Rico and its subareas in hierarchical sequence down to the block group level....STF 1B provides data down to the lowest level of the census geography, census blocks....STF 1 data files for Puerto Rico have a record size of 5,118 characters in one segment....A machine-readable data dictionary is included on the tape without charge. Options include IBM 3480-compatible tape cartridge or 9 track tape reel, 6250 or 1600 bpi, ASCII or EBCDIC, labeled or unlabeled. All orders include a copy of the technical documentation...." The cost for each file is U.S. $175.
Correspondence: U.S. Bureau of the Census, Customer Services, Washington, D.C. 20233. Source: U.S. Bureau of the Census, Data User Services Division, Data Developments, No. XIV-38, Aug 1991.

57:40799 United States. Bureau of the Census (Washington, D.C.). Census of Population and Housing, 1990: Summary Tape File 2 [MRDF]. 1991. Washington, D.C. In Eng.
This file provides census data for the United States and is divided into A and B records. "Population items in the A record include counts of persons by race (37 categories), American Indian tribes (29 categories), Hispanic origin..., and group quarters....Record A housing counts include race of householder...; tenure by persons in unit, household type, and age of householder...; tenure by number of nonrelatives and by number of persons in unit...; and price or rent....Population counts in the B record include persons; families; households; sex; sex by age...; sex by marital status by age...; household size and relationship...; and household type....Housing unit counts in the B record include counts of occupied housing units by tenure and tenure tabulated by persons in unit, rooms, persons per room, units in structure, and age of householder." Both A and B records have a logical record size of 11,442 characters divided into two record segments of 5,721 characters each. The files are available for each state and the District of Columbia.
"Options include 6250 or 1600 bpi, ASCII or EBCDIC, labeled or unlabeled. The files are also available on tape cartridges (IBM 3480 compatible) for the same price." The cost for each tape or cartridge is a minimum of U.S. $175. "The user should note that there are limitations to many of these data. Plese refer to the technical documentation provided with Summary Tape File 2 for a further explanation of the limitations of the data."
Correspondence: U.S. Bureau of the Census, Customer Services, Washington, D.C. 20233. Source: U.S. Bureau of the Census, Data User Services Division, Data Developments, No. XIV-51, Sep 1991.

57:40800 United States. Bureau of the Census (Washington, D.C.). Current Population Survey, June 1990: fertility, birth expectations, and marital history [MRDF]. 1991. Washington, D.C. In Eng.
This file provides data for the United States on "labor force activity for the week prior to the survey. Comprehensive data are available on the employment status, occupation, and industry of persons 15 years old and over. Also shown are personal characteristics such as age, sex, race, marital status, veteran status, household relationship, educational background, and Hispanic origin. In addition, data pertaining to date of first marriage, fertility, birth expectations, and marital history are included in the file. Date of first marriage is asked of all ever married women 18-44 years old. Questions determining the number of live born children and date of birth of youngest and oldest children are asked of women 18-44 years old. Questions concerning expectations of having children are asked of women 18-39 years old." The file structure is rectangular and contains 164,200 logical records, each with a length of 552 characters. "Tapes are priced at [U.S.] $1.25 per megabyte (MB)....This file has 91 MB; therefore, the price is $175. Options include 6250 or 1600 bpi; ASCII or EBCDIC, labeled or unlabeled. The files are also available on tape cartridges (IBM 3480 compatible) for the same price." Accompanying documentation is provided.
Correspondence: U.S. Bureau of the Census, Customer Services, Washington, D.C. 20233. Source: U.S. Bureau of the Census, Data User Services Division, Data Developments, No. XIV-45, Aug 1991.

57:40801 United States. Bureau of the Census (Washington, D.C.). Current Population Survey, March 1991 [MRDF]. 1991. Washington, D.C. In Eng.
"This file, also known as the Annual Demographic File, provides the usual monthly labor force data, but in addition, provides supplemental data on work experience, income, noncash benefits, and migration. Comprehensive work experience information is given on the employment status, occupation, and industry of persons 15 years old and over. Additional data for persons 15 years old and older are available concerning weeks worked and hours per week worked, reason not working full time, total income and income components, and residence on March 1, 1990....Characteristics such as age, sex, race, household relationship, and Hispanic origin are shown for each person in the household enumerated." The file structure is hierarchical and contains 300,012 logical records, each with a size of 656 characters. "Tapes are priced at [U.S.]$1.25 per megabyte (MB) with a minimum price of $175. This file has 197 MB; therefore, the price is $250. Options include 6250 or 1600 bpi; ASCII or EBCDIC, labeled or unlabeled. The files are also available on tape cartridges (IBM 3480 compatible) for the same price."
Correspondence: U.S. Bureau of the Census, Customer Services, Washington, D.C. 20233. Source: U.S. Bureau of the Census, Data User Services Division, Data Developments, No. XIV-61, Oct 1991.


Copyright © 1991-1996, Office of Population Research, Princeton University.