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This article describes some solutions to common problems in pre-election surveys drawing upon Gallup Poll experience. It touches upon problems in sampling, estimation, response validity, the undecided, measuring likelihood to vote, and measuring late trends in voter preference. In conclusion it cites demonstrable gains in accuracy that have followed application of the solutions described.Paul Perry is Vice Chairman, The Gallup Organization, Inc.
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Paul Perry (1979) studied this question.
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