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Memo
To: Members of the NES Research Community
From: Dave Howell, Director of Studies
Re: Release of the 1990 Bias File and Call Records
Date: June 14, 2002

The National Election Studies has just released the 1986 'Bias' Nonresponse file, part of the 1986 National Election Study, and the 1990 'Bias' Nonresponse file, part of the 1990 National Election Study. These datasets are available for free downloading from the ANES website (http://www.electionstudies.org), by following the 'download any dataset'link.

More information about the 1986 Study can be found at: http://www.electionstudies.org/studyres/nes1986/nes1986.htm

More information about the 1990 Study can be found at: http://www.electionstudies.org/studyres/nes1990/nes1990.htm

The 1986 'Bias' Nonresponse file contains respondent-level field administration variables. Of 3833 lines of sample that were originally issued for the 1986 Study, 2176 lines resulted in completed interviews, 618 were non-sample, 824 were refusals and 215 were noninterviews for reasons other than refusal. For each line of sample, the 'Bias' file includes sampling data, result codes, control variables, and interviewer variables. Detailed geocode data are blanked but available under conditions of confidential access (see the ANES Website for more information at http://www.electionstudies.org/studyres/spar/sparweb.htm).

The 1990 'Bias' Nonresponse file contains respondent-level field administration variables. Of 3440 lines of sample that were originally issued for the 1990 Study, 1990 lines resulted in completed interviews, others were non-sample, and others were non-interviews. For each line of sample, the 'Bias' file includes sampling data, result codes, control variables, and interviewer variables. Detailed geocode data are blanked but available under conditions of confidential access (see the aNES Website for more information at http://www.electionstudies.org/studyres/spar/sparweb.htm).

The 1990 Call-Level/Contact-Level File, also part of the 1990 National Election Study, contains call and contact information for the 3440 lines of sample that were originally issued for the 1990 Study. There are 15,415 call records, each containing variables for call date, day of the week, time of the call, call disposition, whether contact was made, and whether an appointment was made. 6,337 of these calls resulted in contact with someone in the household, and a number of variables are coded describing the nature of the contacts.

These newly released specialized files will be of particular interest to those who are interested in studying survey nonresponse. The documentation assumes some degree of familiarity with the administration of face-to-face surveys conducted in area probability samples.

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