This variable is the amount of public assistance payments (AFDC or TANF) that a respondent received month M. M goes from 1 to 48 and represents the month number since the start of panel_1stfullyear. The variable comes from the core file. I20AMT1-I20AMT4 in 1984; S20AMT in the 1990, 1991, 1992, and 1993 panels; T20AMT in the 1996, 2001, 2004, and 2008 panels.