I computed aggregate household income and there are jumps in 1970 and 2014. In the first case there is an increase in raw income while in 2014 there is an increase in the sum of weights. Attached is a plot with the sum of weights over time. Thank you.

The jump you see in 2014 is due to the CPS 2014 ASEC experimental design. When analyzing the 2014 data, you will need to select either the 3/8 file or the 5/8 file using HFLAG. Otherwise, if both parts of the file are analyzed together and weighted using ASECWT, the resulting estimates will be twice the US population, hence the large increase in your sum of weights.

As for 1970, the difference is likely caused by some of the comparability issues prior to 1980. If you havenâ€™t done so already, I would recommend comparing your computed aggregate household income to HHINCOME to see how it compares.