Abstract
Eric Simants (2006) "Longitudinal Microdata Outlier Detection
Techniques"
With more than 8.5 million new records processed each quarter the
Bureau of Labor Statistics' Longitudinal Database (LDB) is one of the
most comprehensive business registry lists in existence. The LDB contains
business establishment data since 1990 and contains over 400 million
records. Since the LDB serves as the sample frame for the Bureau's
establishment based surveys, the publication of Business Employment
Dynamics data, and as a research database for economists, the relevancy
and usefulness of the data rely primarily on the timeliness and
accuracy with which they are collected, cleaned, stored, and reported.
The data are collected by each state from their Unemployment Insurance
system. These data are reviewed through a rigorous process. One
technique used is screening each record through a series of conditional
edits based on deviations from prior values of the variable of interest.
Last Modified Date: January 9, 2007
|