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

On February 26, 2016, the LAUS program issued 2015 annual average civilian labor force and unemployment estimates for census regions and divisions; all states and the District of Columbia; 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, as well as the seven corresponding balance-of-state areas. As described above, the data incorporate new population controls, updated inputs, reestimation of models, and adjustment to new census division and national control totals. Both not-seasonally-adjusted and smoothed-seasonally-adjusted (SSA) monthly data for these areas were revised from January 2011 forward. The updated population controls reflect U.S. Census Bureau revisions from April 2010 forward.

On March 14, 2016, statewide data for Puerto Rico (which are not model-based, but rather tabulated from a household survey similar to the Current Population Survey for the U.S.) were revised from January 2010 forward. The not-seasonally-adjusted data reflect the incorporation of new population controls, while the SSA data reflect seasonal adjustment and smoothing of the recontrolled not-seasonally-adjusted data.

Substate Areas

On April 15, 2016, routine revisions were made to data from 2011 through 2015 for geographic areas below the state level (other than the model-based areas noted above), and official annual averages for 2015 were issued. For all of these areas, estimation inputs were revised back to 2014, while the revisions for 201113 consisted of, at minimum, controlling to the new state totals described above. In addition, some states revised at least some of their estimation inputs for some of their areas as far back as January 2010. For this reason, estimates for all non-modeled areas were footnoted as having been subject to revision from January 2010 forward within the time-series database on April 15.


On March 18, 2016, smoothed-seasonally-adjusted estimates for both the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area and the Balance of Michigan, state less Detroit-Warren-Dearborn MSA in July 1998 were modified to better reflect the impact of a large-scale labor dispute. (See and, respectively.) The corrected data are more consistent with the corresponding estimates for Michigan as a whole, based on long-standing outlier treatment.

On April 27, 2016, corrections were issued for substate areas in Kentucky, as well as eight interstate areas with parts in Kentucky, for January 2016. The establishment-based non-agricultural wage and salary employment inputs to household employment were found to have been over-estimated in the following four counties: Fulton, Harlan, Russell, and Union. Through additivity, employment in all other counties in the State was impacted, but the corrections outside of those four counties were relatively small. While unemployment rates were revised upward by between 0.3 and 0.7 percentage point across the four counties directly impacted by the employment input corrections, rates changed by no more than 0.1 point in the remaining areas affected through additivity, and most had no rate change.

On June 1, 2016, corrections were issued for all cities and city parts in Minnesota for January and February 2016. The errors had resulted from incorrect processing of unemployment insurance claims inputs. Unemployment levels were revised downward by as much as one-third, and associated unemployment rates were revised downward by as much as 2.2 percentage points. The average unemployment level decline was 7.4 percent, and most of the unemployment rate declines were less than 0.5 percentage point.

On November 2, 2016, corrections were issued for substate areas in Wisconsin in July 1998 and substate areas in Montana in all months of 1999. Interstate areas with parts in Wisconsin also were impacted in July 1998. The employment and unemployment level estimates for these area-months had not reflected the appropriate state controls due to past processing errors. The corrections process consisted of simple ratio adjustment to the current state model-based controls. Unemployment rates were mostly unchanged, differing by a maximum of 0.5 percentage point in just one instance.


Last Modified Date: November 2, 2016