AHMAD, Syedah; LENSINK, Robert; MUELLER, Annika. Boosting Survey Response Rates by Announcing Undefined Lottery Prizes in Invitation Email Subject Lines Evidence from a Global Randomized Controlled Trial. Survey Research Methods, [S. l.], v. 16, n. 2, p. 165–206, 2022. DOI: 10.18148/srm/2022.v16i2.7651. Disponível em: https://ojs.ub.uni-konstanz.de/srm/article/view/7651. Acesso em: 20 apr. 2024.