Anonymised and edited data the PREFER study (with German variable and value labels only) is available free of charge from the FDZ-DZA as Scientific Use File in SPSS- and Stata-format. For reasons of data protection, signing a data distribution contract is required to receive the data sets.

If you want to use PREFER data for secondary analysis, please use the application form. Please name any co-users, i. e. researchers in your project who will also have access to the data, in the application form.

If you only want to order the data from the PREFER study, please tick the field "Data of the PREFER I survey 2009 (SUF PREFER 2009)" in the section "Requested Data Sets". If you also want to order DEAS data, you can also check the requested DEAS data. The PREFER participants are recruited from respondents who took part in DEAS for the first time in 2008. Many of them were surveyed again in the later DEAS waves.

The FDZ-DZA will check whether you are eligible to receive the data, because access is permitted only in scientific and non-profit contexts. Scholars working at a university or a research institution as well as students aiming at an academic graduation (as Master, Ph. D.) can apply for usage. For Bachelor candidates the responsible staff member has to apply for usage of the data. To use the data in academic teaching, you have to submit your scientific use files (SUF) to some modifications, which are specified in the data distribution contract.

The FDZ-DZA will set up the data distribution contract and send it to you in duplicate by mail. As soon as we have received a signed copy of the contract, we will grant you access to the requested data. You will receive username and password to log into the protected domain on the FDZ-website. There you will be able to review and download the datasets as well as the documentation material.

If you use PREFER data or documentation for your publications (including theses and reports) or presentations, we kindly request you to follow the citation rules of good scientific practice. You will find notes on how to refer to data, documentation and DOI in the appendix of your contract of usage as well as here for download.