Important Information

Annual Revisions

Each year, historical estimates from the Local Area Unemployment Statistics (LAUS) program are revised to reflect new population controls from the Census Bureau, updated input data, and reestimation. The data for model-based areas also incorporate new seasonal adjustment, and the unadjusted estimates are controlled to new census division and U.S. totals. Substate area data subsequently are revised to incorporate updated inputs, reestimation, and controlling to new statewide totals.

Model-Based Areas

In conjunction with the current revision cycle, LAUS is undergoing a broad program redesign. The first phase of this redesign occurred on March 4, 2015, with the comprehensive replacement of data for census regions and divisions, the states and the District of Columbia, and a handful of large substate and balance-of-state areas based on a new generation of time-series models. The substate model-based areas are as follows: the Los Angeles-Long Beach-Glendale, CA Metropolitan Division; the Miami-Miami Beach-Kendall, FL Metropolitan Division; the Chicago-Naperville-Arlington Heights, IL Metropolitan Division; the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area; New York city, NY; the Cleveland-Elyria, OH Metropolitan Statistical Area; and the Seattle-Bellevue-Everett, WA Metropolitan Division. The metropolitan areas and metropolitan divisions reflect the 2010 Census-based delineations issued by the Office of Management and Budget (OMB) in February 2013. Both smoothed-seasonally-adjusted (SSA) and not-seasonally-adjusted (NSA) data were replaced back to their series beginnings in 1976, 1990, or 1994. Information on the new models is available in the Report on Revision to State and Area Time-Series Models.

State rank tables, maps, and series files were updated on the website to reflect the new data on March 4. However, no supplemental files containing substate model-based areas were updated at that time.

Substate Areas

On March 17, substate estimates from January 1990 through December 2014 will be controlled to the new NSA totals for model-based areas. At the same time, the federal statistical area geography will be converted to the 2010 Census-based delineations that were issued by OMB in February 2013. (More information on the new federal statistical areas is available at The substate data from January 2010 through December 2014 will be provisional as of March 17, and will be foonoted in the BLS time-series database to indicate this. Comprehensive revisions for substate areas from January 2010 forward will be issued on April 21, reflecting methodological enhancements and the use of more timely estimation inputs from the Census Bureau's American Community Survey. (More information on the upcoming revisions to substate estimates is available at Also on April 21, annual average estimates for substate areas in 2014 will be issued.


Last Modified Date: March 4, 2015