Introducing 2012 fixed employment weights for the Employment Cost Index

Beginning with the release of December 2013 estimates, the ECI was reweighted to reflect 2012 employment counts. This reweighting accounted for updates to the occupational and industry classification systems, incorporating the 2010 Standard Occupational Classification system and the 2012 North American Industry Classification System. There changes had minimal impact on the historical continuity of the ECI.