I’m using the EARNWT variable to weight data from the 2015 monthly CPS. I’m only looking at those observations where the MISH variable = 4 or 8. Despite this, when I use the EARNWT as a weight in STATA I’m getting an incorrect number of observations in my regression (- 16 trillion). Should I only use 1 month of data rather than using the entire year’s worth? That is, should my regression include a filter that only calculates the data in January, for example?

Thanks in advance!

Bryan