1) Annual Benchmark revision to the Establishment Survey Data
With the release of January 2011 data on February 4, 2011, the Current Employment Statistics survey will introduce revisions to nonfarm payroll employment, hours, and earnings data to reflect the annual benchmark adjustments for March 2010 and updated seasonal adjustment factors. Not seasonally adjusted data beginning with April 2009 and seasonally adjusted data beginning with January 2006 are subject to revision.
2) Birth/death adjustment factors will be estimated on a quarterly basis
Effective with the release of January 2011 data on February 4, 2011, the establishment survey will begin estimating net business birth/death adjustment factors on a quarterly basis, replacing the current practice of estimating the factors annually. This will allow the establishment survey to incorporate information from the Quarterly Census of Employment and Wages into the birth/death adjustment factors as soon as it becomes available and thereby improve the factors. Additional information on this change is available at
www.bls.gov/ces/ces_quarterly_birthdeath.pdf.
3) Changes in Population Controls for Household Survey
Effective with the release of data for January 2011 on February 4, 2011, revisions will be introduced into the population controls for the household survey. These changes reflect the routine annual updating of intercensal population estimates by the U.S. Census Bureau.