Dykema, Jennifer; Stevenson, John; Klein, Lisa; Kim, Yujin - Mathematica Policy Research - 2012
This study used random assignment to assess the effects of invitation mode on response rates, costs, and demographic …-mailed invitation. Nonresponding faculty received up to two reminders to participate, by e-mail. Response rates were higher for the … groups invited using a postal letter, but the inclusion of $2 did not significantly increase the response rates. …