I am using CPS personal income datafiles from 1990 to 2015, and I have set those “Not in Universe” values (99999s) as missing to restrict my sample (excluding those age <15). Then I have replaced topcoded income values using the 1976-2010 file provided on this page, just to make sure that I have consistent topcodes in my datafile.
However, there still appears income values of 99999s after this (e.g., INCCHILD,INCALIM,INCOTHER, OINCBUS, OINCFARM), and these observations fall within the universe (age>15). I suspect it is the topcoded value, but there still exists values of 99997 for these variables.
How should I deal with these values 99999s when there exists topcodes of 99997 and they fall within the universe?
Many thanks in advance!