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VAR CF0009 TYPE 0 WEIGHT

VAR CF0009    TYPE 0 WEIGHT                                                   
              COLUMNS 24   - 29                                               
              NUMERIC    DEC 4                                                
              NO MISSING DATA CODES

        GENERAL WEIGHT VARIABLE 1                                             
        -------------------------------------------------------------------   
                                                                              
        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                                                         
                                                                              
                                                                              
==============================


Walter Mebane
Mon Nov 12 02:55:58 EST 2001