Use PUMS data for PUMAS belonging only in one county

Galateia over 10 years ago

Hello! I try to use PUMS 5yr 2008-2012 data and I face a strange fact that when I sum the weights (variable PWGTP in the dataset) for the PUMAS that belong to a specific County, I do not take as a result the known total population in this county (compared to the population from ACS 2008-2012 estimates)...
Could anyone advise me if I use the given weights properly? The PUMS data are for PUMAS in one whole state and I try to extract only the PUMAS in the county that I need. Is it possible or there is problem because the PUMS data are defined at a state level?

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Beth Jarosz over 10 years ago

Apologies if my explanation was unclear.
There may be 6 PUMAs in the 2012 TIGER shapefile, but there may have been 4... or 7... (or who knows how many?) in 2000. And the numbering probably changed between 00 and 10.

For example, in Oklahoma the PUMA that was PUMA 100 from 2000-2011 (i.e. labeled in PUMA00 as "100") has become PUMA 500 (i.e. labeled in PUMA10 as "500").

You can create a list showing the changes using the MABLE/GeoCorr correspondence table creator at: mcdc.missouri.edu/.../geocorr12.html
and you can find out more about how the PUMAs changed at
www.census.gov/.../puma.html

I hope that helps!
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Beth Jarosz over 10 years ago

Apologies if my explanation was unclear.
There may be 6 PUMAs in the 2012 TIGER shapefile, but there may have been 4... or 7... (or who knows how many?) in 2000. And the numbering probably changed between 00 and 10.

For example, in Oklahoma the PUMA that was PUMA 100 from 2000-2011 (i.e. labeled in PUMA00 as "100") has become PUMA 500 (i.e. labeled in PUMA10 as "500").

You can create a list showing the changes using the MABLE/GeoCorr correspondence table creator at: mcdc.missouri.edu/.../geocorr12.html
and you can find out more about how the PUMAs changed at
www.census.gov/.../puma.html

I hope that helps!
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