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This file was processed by Sharon Morris and Vijayakumar MohanaSundaraNeru.
Please refer questions or problems to:
smorris@jhu.edu or 410-516-8360
Original File: ICPSR 2933 Part 60 Baltimore, Maryland
Census Tract Data. 1970: Elizabeth Mullen Bogue File
The original ICPSR file contained two record types: a 'SMSA/Central City level' record type and
a 'tract level' record type. We modified the original file and our working file just consisted of the
tract level records.

In our working file there are 549 tracts in the Baltimore SMSA and 1448 variables.

How we arrived at 1448 variables:

v1-v1168 are from the original dataset . In addition there are variables for tract, total tract
population and total tract housing for a total of 1171 variables from the original file. 

We created 267 additional variables by combining variables to make totals. For instance, when
the original file showed white males and white females by ages, we created a new variable giving
the total number of white persons for that age . We created text labels for our new variables.

Ten additional variables were keyed in from the printed 1970 Census Publications. These are
mostly median values that could not be calculated from the original files.


Additional Notes: 

Variable labels for v345 to v384 were missing from the original codebook. These variables
labels were obtained from the National Archives and Records Administration.

V551-569 are unlabeled. In the codebook see page # Reference Copy #29 for more about
these variables. We figured out and supplied the labels for v.564-569.

Note: Tracts that end in 99 are populated only by crews of vessels and are identified by the tract
number suffix 99. These tracts contain values that seem strange.
There were two variables for Negro and White males and females. There were differences in the values for the two variables. Therefore, in making calculations we had to make a choice. We choose to use the variable that did not contain negative values. For instance, v. 110 and v.17 are both Total Negro Males. We choose to use v.17 in our calculation of total Negroes because v.110 contained unexplained negative values. The variables involved were v.17/v110, v16/v72, v25/v91, v26/v129.
More about the original file:

TITLE: Census Tract Data, 1970: Elizabeth Mullen Bogue File 

PRINCIPAL INVESTIGATOR(S): Bogue, Donald.

SUMMARY

The 1970 Census Tract files were originally created by keypunching the data from the printed
publications prepared by the Bureau of the Census. The work was done under the direction of Dr.
Donald Bogue, whose wife, Elizabeth Mullen Bogue, completed much of the data work.
Subsequently, the punchcards were converted to data files and transferred to the National
Archive and Records Administration (NARA). ICPSR received copies of these files
from NARA and converted the binary block-length records to ASCII format.

EXTENT OF COLLECTION: 180 data files + machine-readable documentation (PDF)

EXTENT OF PROCESSING SCAN/ REFORM.DOC

DATA TYPE: aggregate data

TIME PERIOD: 1970

DATE OF COLLECTION: April 1970

FUNDING AGENCY: National Science Foundation, National Institute of Child Health and
Human Development, United States Agency for International Development, and the Social
Science Division of the University of
Chicago.

GRANT NUMBER: inap.

DATA SOURCE: publications of the United States Government (Record Group 287)

DATA FORMAT: LRECL

COLLECTION NOTES: (1) The first two records in each file are city- and metro-level data
with a record length of 9,431. The other records are tract-level data with a record length of 7.092.
Both record types have 1,168 variables. (2) The codebook is provided as a Portable Document
Format (PDF) file. The PDF file format was developed by
Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe
Acrobat Reader. Information
on how to obtain a copy of the Acrobat Reader is provided on the ICPSR Website.

UNIVERSE: All persons and housing units in the United States.

BIBLIOGRAPHIC CITATION: Bogue, Donald. CENSUS TRACT DATA, 1970:
ELIZABETH MULLEN BOGUE FILE [Computer file]. ICPSR version. University of Chicago,
Community and Family Study Center [producer],
1975. Ann Arbor, MI:
Inter-university Consortium for Political and Social Research [distributor], 2000.

DATE ADDED: 2000-09-11

DATE UPDATED: 2000-09-11

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1970 Census Site Design © 2001 by Melissa Work
Site Design © 2002 by Vijayakumar MohanaSundaraNeru