This variable indicates that a respondent received food stamps/SNAP benefits in month M of year Y. M goes from 1 to 12 and represents the calendar month. Y goes from 1 to 6 and represents the number calendar year for a given SIPP panel. This variable comes from the core file. The relevant SIPP variables are I27REC1, I27REC2, I27REC3, I27REC4 in the 1984 panel; R27 in the 1990, 1991, 1992, and 1993 panels; and ER27 in the 1996, 2001, 2004, and 2008 panels.