Hi. I’m looking at median Black household income of each Census tract from the source table B19013B. I’m looking at two time periods, 2008-2012 and 2015-2019. However, I’m seeing too many missing values of more than 30,000 in the variable that used ACS 2015-2019. Could you tell me why this is the case?
Thanks!
I see the same discrepancy with many more missing values in the 2015-2019 data than in 2008-2012, but I couldn’t say why that’s the case. As far as I can tell, this is consistent with the original ACS summary tables. Here’s an example from the Census Bureau’s site (data.census.gov) of B19013B from the 2015-2019 estimates for tracts in Autauga County, AL (the first county alphabetically). It has the same missing values that I see in NHGIS data.
I found this documentation on ACS data suppression on the Census website. If that doesn’t clear it up, you could consider posting a question on the ACS Data Users Group forum.