Reports , News of 11 May 2015

Just published: SOEP Version 30 (1984-2013)


Last December we released an initial version of the 1984 to 2013 waves of the SOEP data (doi:10.5684/soep.v30beta). The new sample M, comprising around 2,700 migrant households, was added to the SOEP in 2013. This addition focuses on immigration to Germany since 1995, and it not only more than doubles the number of immigrants in the SOEP but also closes a gap in the population of respondents representing more recent years of immigration. Extensive documentation on the sampling and integration of the new migration sample will be published soon as a SOEP Survey Paper. A methodological overview of the new Migration Sample can be found in SOEP Survey Paper No. 216.

The previously released version of the data from December 2014 (soep.v30beta) contained only provisional weighting variables for Sample M, because at that point, we still had not received the Microcensus estimates of the size of this population. We are pleased that with the figures now available from the official statistical agencies, we are able to provide you the finalized weighting variables in this version of the data (doi:10.5684/soep.v30). As is always the case in years of refresher and enlargement samples, we are providing weights for the old and new samples, both separately and together. These different sets of weights are designed to make it easier for users to study how the integration of a new sample affects the analysis of specific research topics.

We would also like to note that the weighting variables for 2013 are the first to take into account the 2011 census results, possibly resulting in differences between the 2012 and 2013 survey data due to this revision of the official statistics. More information on this point can be found in SOEP Newsletter  No. 107 | PDF, 3.3 MB . Given the retrospective revision of the 2011 and 2012 Microcensus data to account for the census results, our next data release (soep.v31) will include retrospectively revised weighting variables for the 2011 and 2012 survey data. In addition, we will also be integrating the former FiD sample data from 2010 to 2013 into the user-friendly SOEP format. The data from the FiD project increase the number of cases in the SOEP representing specific family types—for example, single parents and families with a large number of children.

Finally, we are pleased to be providing the new INTERVIEWER dataset for the first time. The dataset comprises demographic and employment information about interviewers, aggregated data on the interviewers’ fieldwork in each wave, as well as personal details that they provided in the two interviewer surveys of 2006 and 2012. In the process of creating the INTERVIEWER dataset, all interviewer indicators (INTID) in all of the SOEP datasets were checked thoroughly and in some cases revised.