I am looking to distinguish between topcoded and N.I.U. values for the variable INCUNEMP. Looking over the documentation, I am confused as to which value is the top code and which is the N.I.U. value. I asked a somewhat similar question here in regard to the OINCBUS variable.
When looking at the documentation for INCUNEMP, I see that across years 99999 values correspond to N.I.U. while 99997 correspond to the top code. However, in looking over the IPUMS CPS Top Code table, it tells me that values of 99999 are set to the top code from 1988 to 2010. My code sets all N.I.U. values to missing values, so I need to correctly distinguish between N.I.U. and topcoded values. Which is the correct top code and which is the N.I.U. value for this variable?