Thomas A. Heberlein, Robert M. Baumgartner, The Effectiveness of the Heberlein-Baumgartner Models for Predicting Response Rates to Mailed Questionnaires: European and U.S. Examples, American Sociological Review, Vol. 46, No. 3 (Jun., 1981), pp. 363-367
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Heberlein et al. (1981) studied this question.
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