Journal of Official Statistics, Vol.21, No.4, 2005. pp. 571589

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Implications for RDD Design from an Incentive Experiment

This article describes a large-scale experiment in the use of monetary incentives in a random digit dial (RDD) telephone survey. The experiment tested providing incentives of different amounts of money and at different stages of the survey. The results show that sending incentives at the refusal conversion stage is about as effective as using them in the initial attempt. Alternative sample designs that incorporate the results of the experiment are evaluated to identify designs that achieve high response rates and are economical. As a result of this evaluation, the design for a future study will use monetary incentives and subsample households that refuse to participate at the refusal conversion stage.

Subsampling refusals, response rates, refusal conversion, prepaid monetary incentives, advance mailing

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