This variable contains total monthly person-level earnings as reported in the SIPP for month M of year Y. M goes from 1 to 12 and represents calendar month. Y goes from 1 to 6 and represents the number calendar year for the given SIPP panel. Months that are outside the time frame covered by an individual's SIPP panel will always be missing and out of universe. The corresponding SIPP variables are PP-EARN1, PP-EARN2, PP-EARN3, PP-EARN4 in the 1984 panel; EARN for the 1990, 1991, 1992, and 1993 panels; and TPEARN for the 1996, 2001, 2004, and 2008 panels. This variable includes both jobs and businesses (self-employment) earnings and is top-coded.