Source: Adapted from: TNS Infratest Sozialforschung. (2013). SOEP 2012 - Erhebungsinstrumente 2012 (Welle 29) des Sozio-oekonomischen Panels: Personenfragebogen, Altstichproben. [Survey instruments 2012 (wave 29) of the Socio-Economic Panel: Individual Questionnaire, Age Samples] (157: Series A; SOEP Survey Papers). DIW/SOEP. [URL link]
Source: Adapted from: TNS Infratest Sozialforschung. (2013). SOEP 2012 - Erhebungsinstrumente 2012 (Welle 29) des Sozio-oekonomischen Panels: Personenfragebogen, Altstichproben. [Survey instruments 2012 (wave 29) of the Socio-Economic Panel: Individual Questionnaire, Age Samples] (157: Series A; SOEP Survey Papers). DIW/SOEP. [URL link]