Due to a technical problem, the weighting has been redone in the 2004 Panel Wave 1 core public use file re-released on January 10, 2007.
The Core data dictionary was re-released on 7/23/07 with updates and clarifications, primarily in the labor force section.
Profit from business was erroneously excluded from the earnings and total income recodes for the SIPP 2004 Panel, Waves 1-4 Core. Waves 1-4 core were re-released on 01/29/08 to correct this problem.