I am using IPUMS CPS to collect data on Union membership, per state, per year, per certain occupations.
In doing my data analysis I am getting some peculiar results. For example, I am looking at per state per year per occupation, and for one state I am getting 40% reporting “member of a labor union” in one year, and 0% in every other year.
The variables I am using are:
Union (with earnings weight)
I am thinking that it might be something with the occupation code? I am collecting data from 1990-2013.
Does anyone have any ideas of what might be happening?