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Mail Survey Experiments: Reminder Postcard and UPS Mail Innovations Envelope
Melissa Helton
RTI International
Joseph P. McMichael
RTI International
Jamie L. Ridenhour
RTI International
This paper discusses the results of two experiments conducted with a national survey that primarily targeted households in rural counties. With a sample of 63,000 addresses drawn from an Address-Based Sampling (ABS) frame we use a two-way factorial design to test whether a reminder postcard significantly improved response rates and whether a UPS Mail Innovations Envelope compared to a 9x12 white envelope improved response rates. We evaluate the trade-offs between costs and response rate improvement and discuss some of the advantages and operational considerations of using UPS Mail Innovations envelopes. We also compare demographics and key outcomes of interest across the four treatment groups assessing the potential of non-response bias.