VAR CF0009 TYPE 0 WEIGHT
COLUMNS 24 - 29
NUMERIC DEC 4
NO MISSING DATA CODES
GENERAL WEIGHT VARIABLE 1
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NOTE ON USE OF WEIGHTS:
~~~~~~~~~~~~~~~~~~~~~~
THERE ARE 9 WEIGHT VARIABLES:
VCF0009 VCF0010 VCF0011
VCF0009A VCF0010A VCF0011A
VCF0009B VCF0010B VCF0011B
1. IMPORTANT: CASES FROM YEARS OTHER THAN 1970, 1994, AND 1996
HAVE IDENTICAL VALUES IN ALL (9) WEIGHT VARIABLES.
2. THE ORIGINAL STUDY DATA FOR 1970 WERE WEIGHTED BY VARIABLE
TYPE; THERE WERE 3 TYPES OF 1970 VARIABLES: TYPE 0, TYPE 1,
TYPE 2.
WEIGHTING CUMULATIVE DATA FILE VARIABLES THAT INCLUDE 1970
DATA MEANS SELECTING THE APPROPRIATE WEIGHT FOR THE TYPE OF
1970 VARIABLE REPRESENTED IN THE DATA. FOR EACH OF THE 3 TYPES
OF 1970 VARIABLES, THERE ARE 3 CUMULATIVE DATA FILE WEIGHT
VARIABLES WHICH HAVE IDENTICAL VALUES FOR 1970 CASES:
CDF VAR CDF VAR CDF VAR
INCLUDES 1970 INCLUDES 1970 INCLUDES 1970
TYPE 0 DATA - TYPE 1 DATA - TYPE 2 DATA -
USE ONE OF: USE ONE OF: USE ONE OF:
~~~~~~~~~~~ ~~~~~~~~~~~ ~~~~~~~~~~~
VCF0009 VCF0010 VCF0011
VCF0009A VCF0010A VCF0011A
VCF0009B VCF0010B VCF0011B
IF NO 1994 NOR 1996 CASES ARE SELECTED IN COMBINATION WITH 1970
CASES, THEN IT DOES NOT MATTER WHICH OF THE 3 WEIGHT VARIABLES
IDENTIFIED FOR THAT TYPE IS SELECTED.
CUMULATIVE DATA FILE VARIABLES THAT INCLUDE 1970 TYPE 1 OR
TYPE 2 DATA ARE IDENTIFIED IN VCF0010 AND VCF0011 DOCUMENTATION;
ALL OTHER CUMULATIVE DATA FILE VARIABLES THAT INCLUDE 1970
DATA USE TYPE 0 DATA. NOTE: DOCUMENTATION IN THIS FILE
PROVIDES FOR EACH VARIABLE (EXCEPT DEMOGRAPHIC, TYPE 0) THE
1970 WEIGHTING APPROPRIATE.
3. 1994 AND 1996 DATA HAVE MORE THAN 1 TYPE OF WEIGHTING AVAILABLE.
EACH TYPE OF WEIGHTING FOR 1994/1996 CASES IS FOUND IDENTICALLY
IN 3 VARIABLES:
1994/1996
WEIGHTING TYPE WEIGHT VALUES IN (3 VARS SAME):
~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TIME-SERIES: VCF0009, VCF0010, VCF0011
TIME-SERIES POST-STRATIFIED A: VCF0009A, VCF0010A, VCF0011A
TIME-SERIES POST STRATIFIED B: VCF0009B, VCF0010B, VCF0011B
SINCE IT IS THE CASE THAT IN THE 1994 STUDY THERE WAS ONLY 1
POST-STRATIFIED TIME-SERIES WEIGHT FOR ALL 1994 VARIABLES,
THE "A" AND "B" WEIGHT VARIABLES ARE THE SAME FOR 1994 CASES.
HOWEVER, IN THE 1996 STUDY THERE WERE 2 POST-STRATIFIED TIME-
SERIES WEIGHTS, ONE FOR 1996 PRE-ELECTION VARIABLES AND THE
OTHER FOR 1996 POST-ELECTION VARIABLES, SO THAT THE "A" WEIGHT
VARIABLES ALL CONTAIN THE (SAME) WEIGHT VALUES APPROPRIATE
FOR WEIGHTING 1996 PRE-ELECTION VARIABLE DATA, AND THE "B"
WEIGHT VARIABLES ALL CONTAIN THE (SAME) WEIGHT VALUES
APPROPRIATE FOR WEIGHTING 1996 POST-ELECTION VARIABLE DATA.
SUMMARY
~~~~~~~
Choice of weight depends upon the following combination, summarized
in the table below:
- type of 1970 data in CDF variable (column)
- type of time-series weighting desired for 1994/1996 data (row)
|| CDF VAR | CDF VAR | CDF VAR | CDF VAR
|| INCLUDES | INCLUDES | INCLUDES | INCLUDES
DESIRED TYPE OF || 1970 | 1970 | 1970 | NO
1994/1996 || TYPE 0 | TYPE 1 | TYPE 2 | 1970
WEIGHTING: || DATA | DATA | DATA | DATA
----------------------||---------------------------------------------
----------------------||---------------------------------------------
|| | | | any of:
non-post-stratified || | | | VCF0009,
|| VCF0009 | VCF0010 | VCF0011 | VCF0010,
|| | | | VCF0011
----------------------||---------------------------------------------
post-stratified 1994 || | | | any of:
AND/OR || | | | VCF0009A,
post-stratified 1996, || | | | VCF0010A,
where CDF var uses || VCF0009A | VCF0010A | VCF0011A | VCF0011A
1996 Pre data || | | |
----------------------||---------------------------------------------
post-stratified 1994 || | | | any of:
AND/OR || | | | VCF0009B
post-stratified 1996, || | | | VCF0010B
where CDF var uses || VCF0009B | VCF0010B | VCF0011B | VCF0011B
1996 Post data || | | |
----------------------||---------------------------------------------
|| any of: | any of: | any of: |
no 1994 data || VCF0009 | VCFOO10 | VCF0011 | any CDF
AND || VCF0009A| VCF0010A| VCF0011A| weight
no 1996 data || VCF0009B| VCF0010B| VCF0011B|
ADDITIONAL NOTES
~~~~~~~~~~~~~~~~
1970 notes:
In 1970, questions (and variables) were designated as 'Type 0,'
'Type 1' or 'Type 2.'
Black respondents were asked all questions. White respondents
were assigned to one of two formats of the questionnaire. Each
format of questionnaire excluded a selection of questions if the
respondent was white; the questions excluded differed in each
format. The two formats of the questionnaire were designated
Form 1 and Form 2.
'Type 0' describes variables for questions which were not excluded
in either questionnaire format. 'Type 1' describes variables for
questions excluded from Form 2, and 'Type 2' describes variables
for questions excluded from Form 1.
All 1970 vars not listed in VCF0010 as type 1 or in VCF0011 as type
2 are type 0; documentation for each Cumulative Data File variable
in this codebook provides the type of 1970 data utilized (if any).
1994, 1996 notes:
The first time-series weight variables produced for the 1994 and
1996 studies did not correct for an underrepresentation in Study
data of younger and less-educated respondents (primarily an effect
of the empanelling design used 1992 to 1996; see the 1994 and 1996
codebook special weight documentation). New weight variables were
therefore produced for 1994 and 1996, constructed to post-stratify
the NES data to match the Current Population Study (CPS) estimate
of the distribution of age group by education level. Since 1996
was a 2-wave study, one new weight was constructed for 1996 Pre
variables and a second for 1996 Post variables.
THE FOLLOWING LIST IDENTIFIES CUMULATIVE DATA FILE VARIABLES THAT
USE 1996 PRE OR 1996 POST DATA. CUMULATIVE DATA FILE VARIABLES NOT
SPECIFICALLY LISTED HERE DO NOT INCLUDE 1996 DATA, WITH THE
EXCEPTION OF DEMOGRAPHIC AND ADMINISTRATION VARIABLES, WHICH USE
1996 PRE DATA (EXCEPT VCF9124):
CUM FILE VARS W/ CUM FILE VARS W/
1996 PRE DATA 1996 POST DATA
(VCF0009A / (VCF0009B /
VCF0010A/VCF0011A) VCF0010B/VCF0011B)
----------------- -----------------
VCF0218 VCF0206
VCF0222 VCF0207
VCF0224 VCF0209-VCF0213
VCF0290 VCF0217
VCF0291 VCF0220
VCF0301 VCF0223
VCF0303 VCF0225
VCF0303A VCF0313
VCF0305 VCF0501
VCF0310 VCF0604-VCF0606
VCF0311 VCF0608
VCF0314-VCF0324 VCF0609
VCF0338 VCF0614
VCF0339 VCF0622
VCF0341-VCF0351 VCF0624
VCF0353-VCF0361 VCF0630-VCF0631
VCF0365-VCF0373 VCF0648-VCF0649,VCF0656
VCF0401-VCF0415 VCF0702-VCF0710
VCF0424-VCF0427 VCF0712
VCF0445 VCF0717-VCF0721
VCF0447-VCF0451 VCF0723
VCF0503 VCF0723a
VCF0504 VCF0724
VCF0522 VCF0725
VCF0541 VCF0726
VCF0542 VCF0728
VCF0549 VCF0729
VCF0550 VCF0734-VCF0737
VCF0613 VCF0740
VCF0619 VCF0741
VCF0621 VCF0801
VCF0713 VCF0875
VCF0714 VCF0972-VCF0978
VCF0727 VCF0980-VCF0991
VCF0803 VCF0993-VCF1003
VCF0804 VCF1005-VCF1013
VCF0806 VCF9004
VCF0809 VCF9005
VCF0823 VCF9012-VCF9018
VCF0824 VCF9021-VCF9023
VCF0830 VCF9030
VCF0834 VCF9030A-VCF9030C
VCF0838-VCF0839 VCF9031
VCF0843 VCF9032
VCF0846-VCF0847 VCF9036
VCF0849-VCF0850 VCF9037
VCF0871-VCF0872 VCF9043
VCF0880-VCF0881 VCF9069
VCF0890
VCF0906-VCF0909
VCF0992
VCF1004
VCF1017-VCF1018
VCF9007
VCF9009
VCF9027-VCF9029
VCF9033
VCF9035
VCF9044
VCF9044A
VCF9045-VCF9047
VCF9049
VCF9073
VCF9075-VCF9081
VCF9083-VCF9089
VCF9091-VCF9096
VCF9099
VCF9101
VCF9104
VCF9106
VCF9109
VCF9111
VCF9114
VCF9116
____________________________
VCF0009 SHOULD BE USED WHEN:
1) 1970 VARIABLES ARE 'TYPE 0' AND
2) POST-STRATIFICATION WEIGHT VALUES FOR 1994/1996 ARE NOT DESIRED
VCF0009 DATA:
1948: All cases weighted 1
1952: All cases weighted 1
1954: All cases weighted 1
1956: All cases weighted 1
1958: 580003
1960: 600003
1962: All cases weighted 1
1964: All cases weighted 1
1966: All cases weighted 1
1968: All cases weighted 1
1970: All cases weighted 1, TYPE 0 QUESTIONS
1972: All cases weighted 1
1974: 742003
1976: 763003
1978: All cases weighted 1
1980: All cases weighted 1
1982: All cases weighted 1
1984: All cases weighted 1
1986: All cases weighted 1
1988: All cases weighted 1
1990: All cases weighted 1
1992: 927000
1994: 940006
1996: 960005
1998: 980002
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