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This Note describes the Year-at-Risk (YAR) file, a SAS (Statistical Analysis System) software system data file, that is the primary source of data for building, testing, and maintaining the models in the Air Force's Enlisted Force Management System. The YAR file contains longitudinal data on every airman who was on regular active duty in the Air Force any time between June 30, 1971, and June 30, 1987. This Note describes each of the variables on the YAR file and lists the possible data codes and their meanings. The Air Force maintains the YAR file and updates it annually with data on airmen who were in the Air Force during the preceding twelve months.

This report is part of the RAND note series. The note was a product of RAND from 1979 to 1993 that reported other outputs of sponsored research for general distribution.

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