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Principal Investigator:  Michael Larsen, Ph.D.

Record linkage, or exact matching, is the process of bringing together records from two or more databases that pertain to common individuals. Often there is not a unique common identifier on the files and information can be partially or fully missing or recorded with error. The primary goal of this proposal is to fully develop, implement, and evaluate hierarachical models with and without one-to-one restrictions for record linkage. In order to achieve the desired goals, progress is needed in specification of statistical models, computational methods for these models, and application oriented implementation of procedures. Anticipated innovations are expected to yield significant improvements in record linkage methods, including methods of computation. The anticipated improvements in record linkage methods are expected to significantly impact record linkage operations in many agencies of the federal government and beyond. Funded by National Security Agency Agreement #98230-10-1-0232.)