Evaluating Active (Opt-In) and Passive (Opt-Out) Consent Bias in the Transfer of Federal Contact Data to a Third-Party Survey Agency

Sakshaug, Joseph Walter; Kreuter, Frauke; Singer, Eleanor; Schmucker, Alexandra. (2016). Evaluating Active (Opt-In) and Passive (Opt-Out) Consent Bias in the Transfer of Federal Contact Data to a Third-Party Survey Agency. Journal of Survey Statistics and Methodology. 4(3), 382-416.