Some variables are listed under IPUMS-CPS March, e.g.,INCLONGJ Earnings from longest job, But not in the origiinal March CPS, e.g., http://www.nber.org/cps/cpsmar2015.pdf
Why is this the case? Are these variables created variables? Thank you.
INCLONGJ corresponds to the variable ERN_VAL (Question 48aa) in the original March ASEC data. This question asks for the income earned from the employer for whom the respondent worked for longest during the previous year.
I hope this helps. Please let us know if there are any other IPUMS-CPS variables you are having difficulty matching to the original CPS questionnaire.