Bretschi D, Schaurer I and Dillman DA (2023) An experimental comparison of three strategies for converting mail respondents in a probability-based mixed-mode panel to Internet respondents. Journal of Survey Statistics and Methodology 11(1): 23-46. https://doi.org/10.1093/jssam/ smab002. City of Mannheim (2020) Einwohnerbestand 2019 in kleinra ¨umiger Gliederung [Population 2019: Small-scale segmentation].
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Bretschi, D., I, S., Dillman, D. A. (2023). An experimental comparison of three strategies for converting mail respondents in a probability-based mixed-mode panel to Internet respondents. Journal of Survey Statistics and Methodology, 11(1), pp. 23-46.
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