Is there a reason that WTSUPP is missing for the period of 1976-1992 and 2014? I am examining data from the Voter Supplement years and don’t think the ASEC changes should affect this variable for 2014. I have little idea why it would be missing for the earlier period. On the other hand, WTFINL is available for all years. Any guidance is welcome.
This should be more clear in the online documentation, but actually the Voter Supplement Notes states that sample weights for November supplements are identical to the basic sample weights. Therefore, for the Voter Supplement WTSUPP should be identical to WTFINL.