The Link King is a SAS/AF software that enables integrated probabilistic/deterministic record linkage and unduplication. It offers unique features not found in other proprietary record linkage programs.

The software's probabilistic record linkage protocol is based on the algorithm developed by MEDSTAT for the Substance Abuse and Mental Health Services Administration's Integrated Database Project. The deterministic record linkage protocols were developed at Washington State's Division of Alcohol and Substance Abuse for use in different evaluation and research projects.
The Link King has a user-friendly graphical interface that makes record linkage and unduplication easy for both beginners and advanced users. The platform includes easy-to-follow instructions for those who are new to data linking, and its artificial intelligence helps users select the most appropriate linkage/unduplication protocol. Experts in the field can appreciate the software's user manual, which includes discussions about data linkage/unduplication matters, a range of user-specified options for blocking and linkage decisions, and a powerful interface for manual review of "uncertain" linkages.
One of the most attractive features of The Link King is that despite its use of SAS/AF as its base, it requires no SAS programming experience. If you have a SAS dataset, The Link King can do the rest. The Link King works best with SAS v9.0 or higher but is also comfortable with SAS v8. Overall, The Link King is an excellent tool for record linkage and consolidation that provides users with a unique combination of protocols and features not available in other proprietary software options.
Version 4.2: Added Double Metaphone Phonetic Algorithm