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A widely used modification of probability sampling techniques involves the use of quotas at the last level of a multistage area probability sample. Here we analyze an experiment comparing this technique, called “probability sampling with quotas” by Sudman, with a full probability design, in two large national surveys. Biases were detected in household size and in men's employment status. Otherwise, results were encouraging for users of carefully conducted PSQ surveys.
C. Bruce Stephenson (Mon,) studied this question.
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