                         1968 NES Time Series Study
                          NES DATASET NUMBER 1968.T


                           Number of Cases: 1673
                          Number of Variables: 615


WEIGHT REQUIRED:  None for Cross-section.
                  None for "All Black Sample".
                  V680003 for "Combined Sample".

SAMPLING NOTES:   SAMPLE SELECTION IS REQUIRED 
                  No filtering on V680004 (Type of Interview) 
                  produces the "Combined Sample" rather than the 
                  Cross-section.
                  1) Use V680004 [and V680264 Race of Respondent]
                     for sample selection.  Users can select any
                     of the following:
                       - Cross-section - cases coded 1,2,3 or 4 in V680004
                       - "Combined sample"  - all cases
                       - "All black sample" - cases coded (5 or 6 in 
                          V680004) OR (1,2,3 or 4 in V680004 and 2
                          in V680264)
                  2) The black supplement alone is NOT a
                     valid sample

DATA NOTES:
    1)  If black supplement cases are used in combination with
        the cross-section ("combined sample"), then weighting
        must be used (see V680003).  
        IMPORTANT: see Sampling note 2 above.
   2)   Frequencies from the codebook are for the cross-section.

SPECIAL THEMES AND NEW TOPICS:
Confidence levels in government; voting on ballot propositions; local
education.

DESIGN FEATURES:
Sample includes a special supplement for Black respondents (N=116).