- APPENDIX  D -

                           nonresponse ('bias') and
                          field administration files


          These files are available only by special permission from
     the NES Board of Overseers.  A written request must be submitted
     to the National Election Studies at the address provided on
     p.iii.






1986  Nonresponse file.

               This rectangular datafile contains 3833 cases from 2176
               complete or partial interviews, 824 refusals, 215 no-
               contacts, and 618 non-sample cases.

               Vars included are the following:

                    1-61      cover sheet (control file) information
                    62-75          sampling information
                    76-86          interviewer information
                    87-109         non-interview information
                    110-170   Census segment profile information

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1988  Nonresponse file.

               This rectangular datafile contains 3503 cases from 2040
               complete or partial interviews, 643 refusals, 210 no-
               contacts, and 610 non-sample cass.

               Variables include those from the Interviewer
               Description booklet, a form used for the first time in
               1988 (completed by interviewers) to describe attempts
               at contact with each household--and, subsequently, with
               each designated R-- within the 1988 NES sample.

               Vars included are the following:

                    1-60      pre cover sheet (control file) 
                    70-76          interviewer
                    77-90          sampling
                    201-263   Interviewer Description Booklet
                    5000+     post cover sheet (control file)

               With special permission, a collection of 105 Census
               variables describing demographics at the segment level
               may also be obtained.  Contact the NES staff for more
               information.

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1990  Nonresponse file.

          This structured datafile is more detailed than previous
          files.  Of the 3420* lines of sample that were originally
          issued for the 1990 election study, 1980* sample lines
          became completed interviews, others were non-sample, and
          still others were designated non-interviews.  For each line
          of sample, in records called 'sample unit' records, this
          datafile provides sampling information, disposition of the
          case, control record variables, and data about the
          interviewer(s).  Census tract information for each sample
          address is available by contacting NES staff.

          Almost every 'sample unit' record is also associated with
          another (or more) records(s):  a record for each personal
          call to the sample address by a field interviewer, the
          'call' record.  There are 15,311* call records in this file,
          each containing variables for the day of the week, time of
          call, and call disposition.  6,310* of the 15,311* personal
          calls made by interviewers resulted in contacts with someone
          in the household, and, if contact was made during a call, an
          additional record containing variables describing the nature
          of the contact is present.

          The structure of the datafile contains 2 levels and 3
          groups.  The first level (also identified as group 1) is the
          'sample unit' level, with 3420 cases.  The second level
          (consisting of groups 2 and 3) is the 'call' level, where it
          is possible to have more than one record per sample unit. 
          The 1990 Post ID is the link variable which links call
          number from level 2 to its corresponding sample unit on
          level 1.  To link a contact record (level 3) with its
          corresponding call (level 2), the Post ID in conjunction
          with the call number is used.

          To illustrate the file structure, a portion from this
          datafile might be as follows:

          GROUP     CASE ID   CALL #    DATA

            1       0001                'sample unit' data (sampling,
                                        inteviewer, etc.)
            2       0001      01             call data for personal
                                        call number 1
            2       0001      02             call data for personal
                                        call number 2
            2       0001      03             call data for personal
                                        call number 3
            2       0001      04             call data for personal
                                        call number 4
            3       0001      04                -contact data for
                                        personal call number 4
            2       0001      05             call data for personal
                                        call number 5
            3       0001      05                -contact data for
                                        personal call number 5

            1       0002                'sample unit' data (sampling,
                                        interviewer, etc.)
            2       0002      01             call data for personal
                                        call number 1
            3       0002      01                -contact data for
                                        personal call number 1

            1       0003                'sample unit' data (sampling,
                                        interviewer, etc.)
            2       0003      01             call data for personal
                                        call number 1
            2       0003      02             call data for personal
                                        call number 2
            2       0003      03             call data for personal
                                        call number 3
            3       0003      03                -contact data for
                                        personal call number 3

               * Note that these numbers reflect a correction to the
               1990 Bias File resulting from correction of the 1990
               PrePost data file; 20 cases were deleted from the 1990
               Study data which were discovered to be either:  1)
               fabricated by an interviewer [16 cases]  or  2)
               interviews of ineligible respondents [4 cases]. 
               Removal of these 20 interview cases from the 1990 Bias
               file resulted in a reduced number of call records and
               contact records as well as fewer records at the sample
               unit level.

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1992  Nonresponse file.

               This rectangular datafile contains 3690 cases from 2485
               complete or partial ("short form") interviews, 497
               refusals, 64 no-contacts, and 431 non-sample cass.

               Variables include those from the Pre and Post
               coversheets, sampling vars, administration and
               interviewer vars.

               Vars included are the following:

                    1-69      pre administration
                    70-86          sampling
                    87-99          pre interviewer
                    100-141   post administration
                    142-154   post interviewer
                    155-160   associated IW vars

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