The linked employer-employee dataset of the IAB (LIAB) is created by matching the data of the IAB establishment panel and the process-produced data of the Federal Employment Services (in particular the IAB). The distinctive feature of these data is the combination of information about individuals and details concerning the firms in which these people work. This facilitates a number of new methods of analysis and the first empirical examination of theoretical concepts. This applies not only to economic questions but for all areas of empirical social research. Studies have so far been conducted on subjects in labour economics, personnel economics and sociology. Some versions of the LIAB are accessible via the research data centre (Forschungsdatenzentrum - FDZ) of the Federal Employment Services (Bundesagentur für Arbeit - BA) at the IAB.