Which was the first 1980 US Census 1% sample on IPUMS USA?

#1

Which was the first 1980 US Census 1% sample available on IPUMS USA, and has that sample been changed since 2001 by either changing which observations are in the sample or by adding in preiviously-missing data (not entirely new variables) for any obervations? I am trying to replicate results from a published paper, and there is a 1039-person difference in the sample sizes we end up with (which the author cannot explain).

#2

Much of this information, if available, is documented on the revisions page. Specifically, the 1980 Labor market Areas sample and the 1980 Detailed Metro/Nonmetro sample were both released on November 23, 2004. It looks like the 1980 Metro sample and the 1980 Urban/rural sample were both available before that time. So it seems like the paper could have used either of these latter two samples. Since then there have been a number of changes and additions to variables within these samples. I’d suggest looking through these changes to verify if any of these fixes may be influencing your sample size.