MEHLKOP, Guido; BECKER, Rolf. The effects of monetary incentives on the response rate in mail surveys on self-reported criminal behavior. Theory and empirical results of an experiment. methods, data, analyses, [S. l.], v. 1, n. 1, p. 5–24, 2007. DOI: 10.12758/mda.2007.001. Disponível em: https://majournals.bib.uni-mannheim.de/mda/article/view/2007.001. Acesso em: 8 oct. 2025.