BECKER, Rolf; IMHOF, Regula; MEHLKOP, Guido. Effects of prepaid monetary incentives on the return of mail survey and self-reporting about delinquency. Empirical results of an experiment. methods, data, analyses, [S. l.], v. 1, n. 2, p. 131–159, 2007. DOI: 10.12758/mda.2007.008. Disponível em: https://majournals.bib.uni-mannheim.de/mda/article/view/2007.008. Acesso em: 8 oct. 2025.