Seasonal Adjustment Files and Documentation

Most series published by the Current Employment Statistics program reflect a regularly recurring seasonal movement that can be measured from past experience. By eliminating that part of the change attributable to the normal seasonal variation, it is possible to observe the cyclical and other nonseasonal movements in these series. Seasonally adjusted series are published monthly for selected employment, hours, and earnings estimates.

Below you will find links to technical details and related research on the CES implementation of seasonal adjustment, including input files used during the latest production run. The seasonal adjustment input files have been compressed into zip files. A zip file utility is necessary to extract the files. For more information please visit How to View ZIP Files.

• Seasonal Adjustment in the Current Employment Statistics Program -- Technical information on the CES implementation of seasonal adjustment, including a detailed description of input files and methodology used. (HTML) (PDF)
• Seasonal adjustment input specification files: All Employees (Zip File)
-- Control (specification) files used as input to X-12-ARIMA for the CES All Employees series. Included is a readme.txt file that provides a brief description of the control files and viewing instructions. The files have been compressed.
• Seasonal adjustment input specification files: All Other Data Types (Zip File)
-- Control (specification) files used as input to X-12-ARIMA for all CES data types other than All Employees. Included is a readme.txt file that provides a brief description of the control files and viewing instructions. The files have been compressed.
• UPDATED Other seasonal adjustment input files (Zip File)
-- Other files used by CES as input to X-12-ARIMA for seasonal adjustment, including user-defined regression files, a file of prior adjustments, and a file containing recent outliers. Included is a readme.txt file that provides a brief description of the files and instructions. The files have been compressed.
• Research Paper: "Concurrent Seasonal Adjustment for Industry Employment Statistics" -- Research evaluating concurrent seasonal adjustment methodology. (HTML) (PDF)

Last Modified Date: June 4, 2004

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