Hartmann, Josef; Krug, Gerhard - Institut für Arbeitsmarkt- und Berufsforschung (IAB) - 2007
consequences when linking administrative data of the 'Bundesagentur für Arbeit' (BA) to survey data on the level of individuals …. Due to reasons of data protection the respondents have to be asked to allow linking their survey data to their … persons were asked, whether they allow linking the survey data to administrative data, we analyse whether there is selectivity …