Data Fusion with Record Linkage

Assuming that there are two sources (e.g. les), which consist of records with diierent informations about some units like people. We want to fusion the information (data) that belong to the same units. Very often in practice no identiication numbers | like the Social Security Number SSN | are available at both les, that's why there is some uncertainity, which records belong together. Anyway, we want to link the records of the sources together, hopefully the right ones. Record Linkage | based on the Likelihood-Ratio-Test | is one method, to link records in an eecient way, at most automatically, without a high amount of review. Thanks to Fellegi and Sunter (1969) we present the basics of Record Linkage they introduced at rst therein. Further on we discuss, how to use Record Linkage in practice.