Impact of Prepaid Incentives in Face-to-Face Surveys: A Large-Scale Experiment with Postage Stamps

Abstract

Nonresponse is a general problem in survey research. Although response rates and the nonresponse trends differ between countries, the general trend is that response rates have been declining over the years (De Leeuw & De Heer, 2002). A high nonresponse rate is a problem as it reduces the number of respondents and consequently the precision of estimates. In addition, nonresponse can be selective. This occurs when nonrespondents differ systematically from respondents as to the survey objectives. As a result, the survey estimates of the key indicators may be biased. Nonresponse is not only a statistical problem, but it is also a financial problem as declining response rates cause increasing survey costs.