Text messages to facilitate the transition to web-first sequential mixed-mode designs in longitudinal surveys
Can targeted cover letters improve participation in health surveys? Results from a randomized controlled trial
Participation in a mobile app survey to collect expenditure data as part of a large-scale probability household panel: coverage and participation rates and biases
Participation in a mobile app survey to collect expenditure data as part of a large-scale probability household panel: response rates and response biases
Targeted initial letters to longitudinal survey sample members: effects on response rates, response speed, and sample composition